Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Vulnerabilities
| Vulnerability |
Severity |
 CVSS |
Exploit Maturity |
EPSS |
Dependency |
Type |
Fixed in (jackson-databind version) |
Remediation Possible** |
Reachability |
| CVE-2026-54513 |
 High |
8.1 |
Not Defined |
0.892% |
jackson-databind-2.21.0.jar |
Direct |
https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4 |
✅ |
|
| CVE-2026-54512 |
High |
8.1 |
Not Defined |
0.873% |
jackson-databind-2.21.0.jar |
Direct |
https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.8 |
✅ |
|
| CVE-2026-91777 |
High |
7.5 |
Not Defined |
0.488% |
jackson-databind-2.21.0.jar |
Direct |
com.fasterxml.jackson.core:jackson-databind:2.18.11,com.fasterxml.jackson.core:jackson-databind:2.21.7,com.fasterxml.jackson.core:jackson-databind:2.22.3,tools.jackson.core:jackson-databind:3.1.7,tools.jackson.core:jackson-databind:3.2.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.2.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.11,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.21.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.22.3 |
✅ |
|
| CVE-2026-91776 |
High |
7.5 |
Not Defined |
0.488% |
jackson-databind-2.21.0.jar |
Direct |
com.fasterxml.jackson.core:jackson-databind:2.18.11,com.fasterxml.jackson.core:jackson-databind:2.21.7,com.fasterxml.jackson.core:jackson-databind:2.22.3,tools.jackson.core:jackson-databind:3.1.7,tools.jackson.core:jackson-databind:3.2.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.22.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.11,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.21.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.2.3 |
✅ |
|
| CVE-2026-89425 |
High |
7.5 |
Not Defined |
0.533% |
jackson-core-2.21.0.jar |
Transitive |
N/A* |
❌ |
|
| CVE-2026-89407 |
High |
7.5 |
Not Defined |
|
jackson-core-2.21.0.jar |
Transitive |
N/A* |
❌ |
|
| CVE-2026-68497 |
High |
7.5 |
Not Defined |
0.581% |
jackson-databind-2.21.0.jar |
Direct |
2.21.6 |
✅ |
|
| CVE-2026-68494 |
High |
7.5 |
Not Defined |
0.372% |
jackson-core-2.21.0.jar |
Transitive |
2.21.4 |
✅ |
|
| CVE-2026-59889 |
 Medium |
6.5 |
Not Defined |
0.346% |
jackson-databind-2.21.0.jar |
Direct |
2.21.5 |
✅ |
|
| CVE-2026-59888 |
Medium |
6.5 |
Not Defined |
0.309% |
jackson-databind-2.21.0.jar |
Direct |
2.21.4 |
✅ |
|
| CVE-2026-54518 |
Medium |
6.5 |
Not Defined |
0.354% |
jackson-databind-2.21.0.jar |
Direct |
https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4 |
✅ |
|
| CVE-2026-83557 |
Medium |
5.6 |
Not Defined |
0.586% |
jackson-databind-2.21.0.jar |
Direct |
2.21.6 |
✅ |
|
| CVE-2026-77310 |
Medium |
5.3 |
Not Defined |
0.187% |
jackson-databind-2.21.0.jar |
Direct |
2.21.5 |
✅ |
|
| CVE-2026-54517 |
Medium |
5.3 |
Not Defined |
0.384% |
jackson-databind-2.21.0.jar |
Direct |
https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4 |
✅ |
|
| CVE-2026-54516 |
Medium |
5.3 |
Not Defined |
0.449% |
jackson-databind-2.21.0.jar |
Direct |
https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4 |
✅ |
|
| CVE-2026-54515 |
Medium |
5.3 |
Not Defined |
0.373% |
jackson-databind-2.21.0.jar |
Direct |
2.21.5 |
✅ |
|
| CVE-2026-54514 |
Medium |
5.3 |
Not Defined |
0.368% |
jackson-databind-2.21.0.jar |
Direct |
https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.8 |
✅ |
|
| CVE-2026-19032 |
Medium |
5.3 |
Not Defined |
0.463% |
jackson-databind-2.21.0.jar |
Direct |
2.21.6 |
✅ |
|
| CVE-2026-18401 |
Medium |
5.3 |
Not Defined |
0.31% |
jackson-core-2.21.0.jar |
Transitive |
2.21.1 |
✅ |
|
*For some transitive vulnerabilities, there is no version of direct dependency with a fix. Check the "Details" section below to see if there is a version of transitive dependency where vulnerability is fixed.
**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation
Details
Partial details (18 vulnerabilities) are displayed below due to a content size limitation in GitHub. To view information on the remaining vulnerabilities, navigate to the Mend Application.
CVE-2026-54513
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54513
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.892%
CVSS 3 Score Details (8.1)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-54512
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled and a type identifier contains generic parameters (i.e. the type ID string contains <), DatabindContext._resolveAndValidateGeneric() validates only the raw container class name (the substring before <) against the configured PTV. If the container type is approved, the method parses the full canonical type string via TypeFactory.constructFromCanonical() and returns the fully parameterized type without ever validating the nested type arguments against the PTV. The nested type arguments are then resolved, instantiated, and populated as beans during deserialization. An attacker who controls the type ID can therefore place a denied class as a generic type parameter of an allowed container — for example java.util.ArrayList<com.evil.Gadget> when only java.util.ArrayList is allow-listed. The container passes the PTV check; com.evil.Gadget is loaded via Class.forName(name, true, loader), instantiated, and its properties are set from attacker-controlled JSON. This completely bypasses an explicitly configured PTV allow-list. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54512
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.873%
CVSS 3 Score Details (8.1)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.8
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-91777
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
Forward-reference completion for @JsonIdentityInfo object IDs in FasterXML jackson-databind performs a linear scan of the pending-reference accumulator for every resolved ID. The affected paths are CollectionDeserializer.CollectionReferringAccumulator.resolveForwardReference() and the equivalent implementation in MapDeserializer. When a document first creates N unresolved object-ID references in an identity-enabled collection or map and then defines those same IDs in reverse order, completion performs on the order of N * (N + 1) / 2 identity comparisons, so a shallow document whose size grows linearly causes quadratic CPU work during deserialization. The reporter instrumented equals() calls on the ID class and measured exactly 2,003,000 comparisons at N = 2,000, against zero comparisons in the pending-reference lookup path for an equally sized control in which every reference was already resolved. The input requires no deep nesting and no syntactically unusual JSON. Exploitation requires an application that deserializes attacker-influenced JSON into an identity-enabled collection or map. The fix replaces the repeated linear lookup with a keyed pending-reference structure.
Publish Date: 2026-09-23
URL: CVE-2026-91777
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.488%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-09-23
Fix Resolution: com.fasterxml.jackson.core:jackson-databind:2.18.11,com.fasterxml.jackson.core:jackson-databind:2.21.7,com.fasterxml.jackson.core:jackson-databind:2.22.3,tools.jackson.core:jackson-databind:3.1.7,tools.jackson.core:jackson-databind:3.2.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.2.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.11,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.21.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.22.3
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-91776
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
TypeDeserializerBase._findDeserializer() in FasterXML jackson-databind caches the resolved deserializer under the raw, attacker-supplied type ID. When name-based polymorphism is configured with a fallback, for example @JsonTypeInfo(use = Id.NAME, defaultImpl = ...), every distinct unrecognized type ID resolves to the same fallback deserializer but is retained as its own key in the _deserializers map. That map has no configurable bound and lives for the lifetime of the type deserializer, so an attacker who can repeatedly supply fresh unknown type IDs causes monotonic memory retention across requests. The reporter observed 10,000 retained entries from 10,000 distinct unknown IDs, against a single entry for a control that repeated one unknown ID the same number of times, isolating attacker-controlled key cardinality from request volume. Exploitation requires an application that enables name-based polymorphism with a defaultImpl or equivalent fallback, accepts attacker-influenced type IDs, and reuses a long-lived ObjectMapper across requests. The fix stops caching fallback resolutions for unrecognized IDs and bounds both the number of cached entries and the length of a cacheable type ID.
Publish Date: 2026-09-23
URL: CVE-2026-91776
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.488%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-09-23
Fix Resolution: com.fasterxml.jackson.core:jackson-databind:2.18.11,com.fasterxml.jackson.core:jackson-databind:2.21.7,com.fasterxml.jackson.core:jackson-databind:2.22.3,tools.jackson.core:jackson-databind:3.1.7,tools.jackson.core:jackson-databind:3.2.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.22.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.11,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.21.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.2.3
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-89425
Vulnerable Library - jackson-core-2.21.0.jar
Core Jackson processing abstractions (aka Streaming API), implementation for JSON
Library home page: https://github.com/FasterXML/jackson-core
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-core/2.21.0/1f7c3f82e6e2ef5def0a12d7dd754e26f0c0ae28/jackson-core-2.21.0.jar
Dependency Hierarchy:
- jackson-databind-2.21.0.jar (Root Library)
- ❌ jackson-core-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
UTF8DataInputJsonParser._reportInvalidToken() in FasterXML jackson-core builds the offending-token text for its error message by appending Java identifier characters to a StringBuilder in a loop that has no upper bound. Unlike the three sibling parser implementations, including UTF8StreamJsonParser, it never consults ErrorReportConfiguration.getMaxErrorTokenLength() (default 256). A malformed token supplied to a parser created through JsonFactory.createParser(DataInput) is therefore accumulated in full. No StreamReadConstraints setting mitigates this: maxDocumentLength cannot be applied to DataInput sources at all, and maxStringLength does not cover this path because the accumulation bypasses ReadConstrainedTextBuffer. The reporter measured a 20,000,109-character exception message from a 20-million-character malformed token on the DataInput path, against 367 characters for identical input on the InputStream path. Scaling the payload drives the StringBuilder, which also incurs byte-to-char expansion and internal array doubling, to many times the raw payload size and can trigger OutOfMemoryError for the whole JVM. UTF8DataInputJsonParser was introduced in 2.8.0 together with createParser(DataInput); releases before 2.8.0 do not contain the affected class.
Publish Date: 2026-09-23
URL: CVE-2026-89425
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.533%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-09-23
Fix Resolution: com.fasterxml.jackson.core:jackson-core:2.18.11,com.fasterxml.jackson.core:jackson-core:2.21.7,com.fasterxml.jackson.core:jackson-core:2.22.3,tools.jackson.core:jackson-core:3.1.7,tools.jackson.core:jackson-core:3.2.3,https://github.com/FasterXML/jackson-core.git - jackson-core-3.2.3,https://github.com/FasterXML/jackson-core.git - jackson-core-2.22.3,https://github.com/FasterXML/jackson-core.git - jackson-core-2.21.7,https://github.com/FasterXML/jackson-core.git - jackson-core-2.18.11,https://github.com/FasterXML/jackson-core.git - jackson-core-3.1.7
CVE-2026-89407
Vulnerable Library - jackson-core-2.21.0.jar
Core Jackson processing abstractions (aka Streaming API), implementation for JSON
Library home page: https://github.com/FasterXML/jackson-core
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-core/2.21.0/1f7c3f82e6e2ef5def0a12d7dd754e26f0c0ae28/jackson-core-2.21.0.jar
Dependency Hierarchy:
- jackson-databind-2.21.0.jar (Root Library)
- ❌ jackson-core-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
NumberInput.looksLikeValidNumber() in FasterXML jackson-core pre-validates "stringified numbers" with two regular expressions: PATTERN_FLOAT ([+-]?[0-9][.]?[0-9]+([eE][+-]?[0-9]+)?), present since 2.17.0, and PATTERN_FLOAT_TRAILING_DOT, added in 2.17.2. PATTERN_FLOAT places adjacent quantifiers over the same character class -- an optional [0-9] run, an optional dot, then a required [0-9]+ run -- so input that ultimately fails to match forces Java's backtracking engine to retry every possible split point of the digit run.
Matching cost therefore grows with the square of the input length.
An attacker who can supply JSON that an application deserializes into a numeric target type reaches this method through jackson-databind's default String-to-number coercion (StdDeserializer and NumberDeserializers for BigDecimal, BigInteger, Double and Float).
Because StreamReadConstraints.maxStringLength defaults to 20,000,000 characters, no constraint bounds the input before it reaches the regex.
Testing by the reporter confirmed O(n^2) growth across five consecutive input-size doublings, with a single 160,000-character string consuming roughly 74 seconds in one call; a small number of concurrent requests of ordinary body size can therefore exhaust a server's request-handling thread pool.
The affected method does not exist before 2.17.0, so 2.16.x and earlier releases are not affected.
The fix replaces both regular expressions with a hand-rolled single-pass scan.
Mend Note: The description of this vulnerability differs from MITRE.
Publish Date: 2026-09-22
URL: CVE-2026-89407
Threat Assessment
Exploit Maturity: Not Defined
EPSS:
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-09-22
Fix Resolution: com.fasterxml.jackson.core:jackson-core:2.18.11,com.fasterxml.jackson.core:jackson-core:2.21.7,com.fasterxml.jackson.core:jackson-core:2.22.3,tools.jackson.core:jackson-core:3.1.7,tools.jackson.core:jackson-core:3.2.2,https://github.com/FasterXML/jackson-core.git - jackson-core-2.18.11,https://github.com/FasterXML/jackson-core.git - jackson-core-2.22.3,https://github.com/FasterXML/jackson-core.git - jackson-core-3.2.2,https://github.com/FasterXML/jackson-core.git - jackson-core-2.21.7,https://github.com/FasterXML/jackson-core.git - jackson-core-3.1.7
CVE-2026-68497
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind binds a JSON string to a javax.xml.datatype.Duration or javax.xml.datatype.XMLGregorianCalendar field by passing the raw string verbatim to DatatypeFactory.newDuration(value) or newXMLGregorianCalendar(value) in CoreXMLDeserializers.Std._deserialize. These deserializers are registered by default with no opt-in, so a plain ObjectMapper or JsonMapper with no polymorphic typing and no special configuration reaches this path. The XML Schema lexical grammar permits numeric components of arbitrary length, which the JDK materializes through the native BigInteger(String) and BigDecimal(String) constructors, both quadratic in digit count. Because the digits sit inside a JSON string token rather than a JSON number token, jackson-core's StreamReadConstraints.maxNumberLength guard never applies; jackson's own NumberDeserializers call validateIntegerLength or validateFPLength before parsing a stringified number, but the XML datatype deserializer omits that pre-check. An unauthenticated attacker can therefore submit a single request of a few megabytes, such as a Duration value consisting of the letter P followed by several million digits and the letter Y, and force tens of seconds to several minutes of single-threaded CPU work; a handful of concurrent requests can saturate a server's worker threads. This affects com.fasterxml.jackson.core:jackson-databind from 2.0.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2.
Publish Date: 2026-09-11
URL: CVE-2026-68497
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.581%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-09-11
Fix Resolution: 2.21.6
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-68494
Vulnerable Library - jackson-core-2.21.0.jar
Core Jackson processing abstractions (aka Streaming API), implementation for JSON
Library home page: https://github.com/FasterXML/jackson-core
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-core/2.21.0/1f7c3f82e6e2ef5def0a12d7dd754e26f0c0ae28/jackson-core-2.21.0.jar
Dependency Hierarchy:
- jackson-databind-2.21.0.jar (Root Library)
- ❌ jackson-core-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
The fix released in jackson-core 2.18.6 and 2.21.1 for CVE-2026-18401 (GHSA-72hv-8253-57qq, number length constraint bypass in the non-blocking parser) is incomplete. This record covers the remaining bypass.
The earlier fix wired validateIntegerLength() into a new _setIntLength() helper and invoked it wherever the integer portion of a number is decided: a terminator byte arrives, a '.' or 'e'/'E' is seen, or input ends inside a fully buffered value. It was not invoked on the attacker-relevant path where the parser runs out of input while still inside the MINOR_NUMBER_INTEGER_DIGITS minor state and returns NOT_AVAILABLE to the caller.
As a result, an attacker who streams JSON to a non-blocking parser in many small chunks, without ever sending a terminator byte, keeps the parser inside MINOR_NUMBER_INTEGER_DIGITS indefinitely. _textBuffer.expandCurrentSegment() grows the accumulator on every chunk while validateIntegerLength() is never called. The accumulator is bounded only by maxStringLength (20 MiB by default) rather than by maxNumberLength (1000 by default), an amplification of roughly 20,000x over the documented limit. Because Java char values occupy two bytes, a single connection can be driven to approximately 40 MiB of heap before the validator finally fires when the value completes.
The equivalent fraction-path code is correct: _finishFloatFraction() calls _setFractLength() before its NOT_AVAILABLE return. The missing call affects the integer-digit paths in _startPositiveNumber(), _startNegativeNumber() and _finishNumberIntegralPart() in NonBlockingUtf8JsonParserBase.
Impact: reactive frameworks such as Spring WebFlux/Reactor, Quarkus, Helidon and Vert.x feed inbound HTTP or gRPC bytes to the async parser as they arrive, which is precisely the chunked-feed shape required. Operators who set StreamReadConstraints.maxNumberLength expecting it to cap memory per number value do not get that guarantee; memory accumulates per concurrent connection and attacker-controlled concurrency can exhaust the JVM heap. The synchronous parsers (UTF8StreamJsonParser, ReaderBasedJsonParser) and the async parser operating on complete input are not affected.
Exploitation requires only the ability to stream data to a parsing endpoint; no privileges or user interaction are needed.
This issue affects com.fasterxml.jackson.core:jackson-core from version 2.15.0 through 2.18.7, and from 2.19.0 through 2.21.3, and tools.jackson.core:jackson-core from 3.0.0 through 3.1.3. Versions prior to 2.15.0 are not affected, because StreamReadConstraints -- which defines the maxNumberLength setting -- was first introduced in jackson-core 2.15.0, so no such constraint exists to be bypassed in earlier releases. Note that GHSA-r7wm-3cxj-wff9 states the affected 2.x range without a lower bound. The 2.22.x and 3.2.x release lines are not affected: those branches were created after the fix commit landed on 2026-05-21 and therefore contain it from their initial releases (2.22.0, tagged 2026-06-03, and 3.2.0, tagged 2026-06-08).
Publish Date: 2026-08-04
URL: CVE-2026-68494
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.372%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-08-04
Fix Resolution (com.fasterxml.jackson.core:jackson-core): 2.21.4
Direct dependency fix Resolution (com.fasterxml.jackson.core:jackson-databind): 2.21.4
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-59889
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.18.0 until 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1, UnwrappedPropertyHandler.processUnwrapped() replays buffered JSON for a @JsonUnwrapped property and calls prop.deserializeAndSet() without a prop.visibleInView(ctxt.getActiveView()) guard, allowing a property annotated with both @JsonView and @JsonUnwrapped to be written from attacker JSON under a less-privileged active view. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.
Publish Date: 2026-07-14
URL: CVE-2026-59889
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.346%
CVSS 3 Score Details (6.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Origin: GHSA-5gvw-p9qm-jgwh
Release Date: 2026-07-14
Fix Resolution: 2.21.5
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-59888
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.15.0 until 2.18.8, 2.21.4, and 3.1.4, Java Records using a PropertyNamingStrategy can bypass @JsonIgnore because POJOPropertiesCollector._removeUnwantedIgnorals() records an ignored component under its original implicit name before _renameUsing() applies the naming strategy, allowing the renamed JSON key to be assigned to the Record constructor parameter. This issue is fixed in versions 2.18.8, 2.21.4, and 3.1.4.
Publish Date: 2026-07-14
URL: CVE-2026-59888
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.309%
CVSS 3 Score Details (6.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Origin: GHSA-3pjw-73gf-8qr5
Release Date: 2026-07-14
Fix Resolution: 2.21.4
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-54518
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, UnwrappedPropertyHandler.processUnwrappedCreatorProperties() replays buffered JSON into creator parameters but never consults prop.visibleInView(activeView). The normal property-based creator path gates creator properties on the active view, but this unwrapped-creator replay path bypasses that check, so a constructor parameter annotated with both @JsonView(AdminView.class) and @JsonUnwrapped is populated from attacker JSON even when a more restrictive view is active. This vulnerability is fixed in 2.21.4 and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54518
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.354%
CVSS 3 Score Details (6.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-83557
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
DefaultBaseTypeLimitingValidator is the PolymorphicTypeValidator applied automatically whenever @JsonTypeInfo is used without an explicitly configured custom validator. It denies polymorphic resolution only for a fixed set of "unsafe base types", and its isSafeSubType method returns true unconditionally for every base type outside that set. java.lang.Comparable was absent from the list despite being implemented by a very large fraction of JDK and application classes, comparable in breadth to java.io.Serializable, which is on the list for that reason. An application declaring an @JsonTypeInfo-annotated property or class with Comparable as its base type, and no custom PolymorphicTypeValidator, will accept a type identifier for essentially any class implementing Comparable. This yields an attacker-controlled object instantiation primitive; a demonstrated case constructs a java.io.File for an arbitrary attacker-chosen path, which becomes path-traversal-adjacent if the application subsequently calls path-sensitive methods on the value. No class implementing Comparable has been identified that yields code execution through deserialization alone. Global Default Typing via activateDefaultTyping is not affected, because that method structurally requires an explicit PolymorphicTypeValidator argument. This affects com.fasterxml.jackson.core:jackson-databind from 2.11.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2.
Publish Date: 2026-09-01
URL: CVE-2026-83557
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.586%
CVSS 3 Score Details (5.6)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: Low
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Origin: GHSA-gx83-3vf8-gh7j
Release Date: 2026-09-01
Fix Resolution: 2.21.6
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-77310
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. Prior to versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1 on their respective release lines, the java.net.InetAddress branch of FromStringDeserializer.Std._deserialize() calls InetAddress.getByName() on attacker-controlled input, causing eager DNS resolution during deserialization and enabling DNS-based server-side request forgery and internal-host enumeration. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.
Publish Date: 2026-08-24
URL: CVE-2026-77310
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.187%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: None
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Origin: GHSA-vvgp-rfg2-7rr6
Release Date: 2026-08-24
Fix Resolution: 2.21.5
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-54517
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, in BeanDeserializer._deserializeUsingPropertyBased, the active-view (@JsonView) filter was applied only to creator properties; the regular property-buffering branch performed no prop.visibleInView(activeView) check. A change making SetterlessProperty.isMerging() return true routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted @JsonView is populated from attacker JSON even when the active view excludes it. This vulnerability is fixed in 2.21.4 and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54517
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.384%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-54516
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, POJOPropertiesCollector._renameProperties() allows a property with @JsonProperty("renamed") on the getter and @JsonIgnore on the setter to be renamed rather than dropped. With MapperFeature.INFER_PROPERTY_MUTATORS enabled (default), the private backing field is retained; during deserialization BeanDeserializerFactory.addBeanProps() sees hasField()==true, builds a FieldProperty, and makes the backing field writable. An attacker supplying the renamed JSON key writes the backing field directly, bypassing the @JsonIgnore on the setter. This vulnerability is fixed in 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54516
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.449%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-54515
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.8.0 until 2.18.9, 2.21.5, and 3.1.4, in BeanDeserializerBase.createContextual(), per-property @JsonIgnoreProperties exclusions are applied by _handleByNameInclusion(), producing a contextual deserializer whose BeanPropertyMap has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by @JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES)) rebuilds from this._beanProperties (the original, unfiltered map) instead of contextual._beanProperties, then overwrites the filtered map — restoring every property _handleByNameInclusion had just removed. The ignored property becomes writable again. This vulnerability is fixed in 2.18.9, 2.21.5, and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54515
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.373%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: 2.21.5
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-54514
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.0.0 until 2.18.8, 2.21.4, and 3.1.4, JDKFromStringDeserializer constructed InetSocketAddress with new InetSocketAddress(host, port), which performs eager DNS name resolution for hostname inputs at deserialization time. An application that binds untrusted JSON into a type containing an InetSocketAddress field issues an attacker-chosen DNS query during readValue, before any application-level validation or connect logic. The fix uses InetSocketAddress.createUnresolved(host, port), deferring DNS to an explicit connect. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54514
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.368%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: None
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.8
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2026-19032
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
- ❌ jackson-databind-2.21.0.jar (Vulnerable Library)
Found in base branch: main
Vulnerability Details
jackson-databind's deserializer for java.nio.file.Path resolves an attacker-supplied URI without restricting the URI scheme. In JDKFromStringDeserializer.NioPathHelper.deserialize, a string bound from untrusted JSON is passed to new URI(value) and then to Path.of(uri). When that throws FileSystemNotFoundException, the code enumerates ServiceLoader and calls provider.getPath(uri) on the first provider whose scheme matches the attacker-chosen scheme. Untrusted JSON can therefore select and drive an arbitrary registered FileSystemProvider during readValue under a default JsonMapper, and forces provider class loading at the same time. With only the JDK built-in providers (file, jar/zipfs) present, the resolved path is inert and no mount or network I/O occurs; further impact requires a side-effecting third-party FileSystemProvider on the classpath. This affects com.fasterxml.jackson.core:jackson-databind from 2.8.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2. Binding java.nio.file.Path from untrusted JSON should be avoided regardless of version.
Publish Date: 2026-09-01
URL: CVE-2026-19032
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.463%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: Low
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Origin: GHSA-wjgm-6hv5-3cvf
Release Date: 2026-09-01
Fix Resolution: 2.21.6
⛑️ Automatic Remediation will be attempted for this issue.
⛑️Automatic Remediation will be attempted for this issue.
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Vulnerabilities
*For some transitive vulnerabilities, there is no version of direct dependency with a fix. Check the "Details" section below to see if there is a version of transitive dependency where vulnerability is fixed.
**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation
Details
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54513
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.892%
CVSS 3 Score Details (8.1)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled and a type identifier contains generic parameters (i.e. the type ID string contains <), DatabindContext._resolveAndValidateGeneric() validates only the raw container class name (the substring before <) against the configured PTV. If the container type is approved, the method parses the full canonical type string via TypeFactory.constructFromCanonical() and returns the fully parameterized type without ever validating the nested type arguments against the PTV. The nested type arguments are then resolved, instantiated, and populated as beans during deserialization. An attacker who controls the type ID can therefore place a denied class as a generic type parameter of an allowed container — for example java.util.ArrayList<com.evil.Gadget> when only java.util.ArrayList is allow-listed. The container passes the PTV check; com.evil.Gadget is loaded via Class.forName(name, true, loader), instantiated, and its properties are set from attacker-controlled JSON. This completely bypasses an explicitly configured PTV allow-list. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54512
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.873%
CVSS 3 Score Details (8.1)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.8
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
Forward-reference completion for @JsonIdentityInfo object IDs in FasterXML jackson-databind performs a linear scan of the pending-reference accumulator for every resolved ID. The affected paths are CollectionDeserializer.CollectionReferringAccumulator.resolveForwardReference() and the equivalent implementation in MapDeserializer. When a document first creates N unresolved object-ID references in an identity-enabled collection or map and then defines those same IDs in reverse order, completion performs on the order of N * (N + 1) / 2 identity comparisons, so a shallow document whose size grows linearly causes quadratic CPU work during deserialization. The reporter instrumented equals() calls on the ID class and measured exactly 2,003,000 comparisons at N = 2,000, against zero comparisons in the pending-reference lookup path for an equally sized control in which every reference was already resolved. The input requires no deep nesting and no syntactically unusual JSON. Exploitation requires an application that deserializes attacker-influenced JSON into an identity-enabled collection or map. The fix replaces the repeated linear lookup with a keyed pending-reference structure.
Publish Date: 2026-09-23
URL: CVE-2026-91777
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.488%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-09-23
Fix Resolution: com.fasterxml.jackson.core:jackson-databind:2.18.11,com.fasterxml.jackson.core:jackson-databind:2.21.7,com.fasterxml.jackson.core:jackson-databind:2.22.3,tools.jackson.core:jackson-databind:3.1.7,tools.jackson.core:jackson-databind:3.2.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.2.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.11,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.21.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.22.3
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
TypeDeserializerBase._findDeserializer() in FasterXML jackson-databind caches the resolved deserializer under the raw, attacker-supplied type ID. When name-based polymorphism is configured with a fallback, for example @JsonTypeInfo(use = Id.NAME, defaultImpl = ...), every distinct unrecognized type ID resolves to the same fallback deserializer but is retained as its own key in the _deserializers map. That map has no configurable bound and lives for the lifetime of the type deserializer, so an attacker who can repeatedly supply fresh unknown type IDs causes monotonic memory retention across requests. The reporter observed 10,000 retained entries from 10,000 distinct unknown IDs, against a single entry for a control that repeated one unknown ID the same number of times, isolating attacker-controlled key cardinality from request volume. Exploitation requires an application that enables name-based polymorphism with a defaultImpl or equivalent fallback, accepts attacker-influenced type IDs, and reuses a long-lived ObjectMapper across requests. The fix stops caching fallback resolutions for unrecognized IDs and bounds both the number of cached entries and the length of a cacheable type ID.
Publish Date: 2026-09-23
URL: CVE-2026-91776
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.488%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-09-23
Fix Resolution: com.fasterxml.jackson.core:jackson-databind:2.18.11,com.fasterxml.jackson.core:jackson-databind:2.21.7,com.fasterxml.jackson.core:jackson-databind:2.22.3,tools.jackson.core:jackson-databind:3.1.7,tools.jackson.core:jackson-databind:3.2.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.22.3,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.11,https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.21.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.7,https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.2.3
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-core-2.21.0.jar
Core Jackson processing abstractions (aka Streaming API), implementation for JSON
Library home page: https://github.com/FasterXML/jackson-core
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-core/2.21.0/1f7c3f82e6e2ef5def0a12d7dd754e26f0c0ae28/jackson-core-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
UTF8DataInputJsonParser._reportInvalidToken() in FasterXML jackson-core builds the offending-token text for its error message by appending Java identifier characters to a StringBuilder in a loop that has no upper bound. Unlike the three sibling parser implementations, including UTF8StreamJsonParser, it never consults ErrorReportConfiguration.getMaxErrorTokenLength() (default 256). A malformed token supplied to a parser created through JsonFactory.createParser(DataInput) is therefore accumulated in full. No StreamReadConstraints setting mitigates this: maxDocumentLength cannot be applied to DataInput sources at all, and maxStringLength does not cover this path because the accumulation bypasses ReadConstrainedTextBuffer. The reporter measured a 20,000,109-character exception message from a 20-million-character malformed token on the DataInput path, against 367 characters for identical input on the InputStream path. Scaling the payload drives the StringBuilder, which also incurs byte-to-char expansion and internal array doubling, to many times the raw payload size and can trigger OutOfMemoryError for the whole JVM. UTF8DataInputJsonParser was introduced in 2.8.0 together with createParser(DataInput); releases before 2.8.0 do not contain the affected class.
Publish Date: 2026-09-23
URL: CVE-2026-89425
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.533%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-09-23
Fix Resolution: com.fasterxml.jackson.core:jackson-core:2.18.11,com.fasterxml.jackson.core:jackson-core:2.21.7,com.fasterxml.jackson.core:jackson-core:2.22.3,tools.jackson.core:jackson-core:3.1.7,tools.jackson.core:jackson-core:3.2.3,https://github.com/FasterXML/jackson-core.git - jackson-core-3.2.3,https://github.com/FasterXML/jackson-core.git - jackson-core-2.22.3,https://github.com/FasterXML/jackson-core.git - jackson-core-2.21.7,https://github.com/FasterXML/jackson-core.git - jackson-core-2.18.11,https://github.com/FasterXML/jackson-core.git - jackson-core-3.1.7
Vulnerable Library - jackson-core-2.21.0.jar
Core Jackson processing abstractions (aka Streaming API), implementation for JSON
Library home page: https://github.com/FasterXML/jackson-core
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-core/2.21.0/1f7c3f82e6e2ef5def0a12d7dd754e26f0c0ae28/jackson-core-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
NumberInput.looksLikeValidNumber() in FasterXML jackson-core pre-validates "stringified numbers" with two regular expressions: PATTERN_FLOAT ([+-]?[0-9][.]?[0-9]+([eE][+-]?[0-9]+)?), present since 2.17.0, and PATTERN_FLOAT_TRAILING_DOT, added in 2.17.2. PATTERN_FLOAT places adjacent quantifiers over the same character class -- an optional [0-9] run, an optional dot, then a required [0-9]+ run -- so input that ultimately fails to match forces Java's backtracking engine to retry every possible split point of the digit run.
Matching cost therefore grows with the square of the input length.
An attacker who can supply JSON that an application deserializes into a numeric target type reaches this method through jackson-databind's default String-to-number coercion (StdDeserializer and NumberDeserializers for BigDecimal, BigInteger, Double and Float).
Because StreamReadConstraints.maxStringLength defaults to 20,000,000 characters, no constraint bounds the input before it reaches the regex.
Testing by the reporter confirmed O(n^2) growth across five consecutive input-size doublings, with a single 160,000-character string consuming roughly 74 seconds in one call; a small number of concurrent requests of ordinary body size can therefore exhaust a server's request-handling thread pool.
The affected method does not exist before 2.17.0, so 2.16.x and earlier releases are not affected.
The fix replaces both regular expressions with a hand-rolled single-pass scan.
Mend Note: The description of this vulnerability differs from MITRE.
Publish Date: 2026-09-22
URL: CVE-2026-89407
Threat Assessment
Exploit Maturity: Not Defined
EPSS:
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-09-22
Fix Resolution: com.fasterxml.jackson.core:jackson-core:2.18.11,com.fasterxml.jackson.core:jackson-core:2.21.7,com.fasterxml.jackson.core:jackson-core:2.22.3,tools.jackson.core:jackson-core:3.1.7,tools.jackson.core:jackson-core:3.2.2,https://github.com/FasterXML/jackson-core.git - jackson-core-2.18.11,https://github.com/FasterXML/jackson-core.git - jackson-core-2.22.3,https://github.com/FasterXML/jackson-core.git - jackson-core-3.2.2,https://github.com/FasterXML/jackson-core.git - jackson-core-2.21.7,https://github.com/FasterXML/jackson-core.git - jackson-core-3.1.7
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind binds a JSON string to a javax.xml.datatype.Duration or javax.xml.datatype.XMLGregorianCalendar field by passing the raw string verbatim to DatatypeFactory.newDuration(value) or newXMLGregorianCalendar(value) in CoreXMLDeserializers.Std._deserialize. These deserializers are registered by default with no opt-in, so a plain ObjectMapper or JsonMapper with no polymorphic typing and no special configuration reaches this path. The XML Schema lexical grammar permits numeric components of arbitrary length, which the JDK materializes through the native BigInteger(String) and BigDecimal(String) constructors, both quadratic in digit count. Because the digits sit inside a JSON string token rather than a JSON number token, jackson-core's StreamReadConstraints.maxNumberLength guard never applies; jackson's own NumberDeserializers call validateIntegerLength or validateFPLength before parsing a stringified number, but the XML datatype deserializer omits that pre-check. An unauthenticated attacker can therefore submit a single request of a few megabytes, such as a Duration value consisting of the letter P followed by several million digits and the letter Y, and force tens of seconds to several minutes of single-threaded CPU work; a handful of concurrent requests can saturate a server's worker threads. This affects com.fasterxml.jackson.core:jackson-databind from 2.0.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2.
Publish Date: 2026-09-11
URL: CVE-2026-68497
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.581%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-09-11
Fix Resolution: 2.21.6
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-core-2.21.0.jar
Core Jackson processing abstractions (aka Streaming API), implementation for JSON
Library home page: https://github.com/FasterXML/jackson-core
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-core/2.21.0/1f7c3f82e6e2ef5def0a12d7dd754e26f0c0ae28/jackson-core-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
The fix released in jackson-core 2.18.6 and 2.21.1 for CVE-2026-18401 (GHSA-72hv-8253-57qq, number length constraint bypass in the non-blocking parser) is incomplete. This record covers the remaining bypass.
The earlier fix wired validateIntegerLength() into a new _setIntLength() helper and invoked it wherever the integer portion of a number is decided: a terminator byte arrives, a '.' or 'e'/'E' is seen, or input ends inside a fully buffered value. It was not invoked on the attacker-relevant path where the parser runs out of input while still inside the MINOR_NUMBER_INTEGER_DIGITS minor state and returns NOT_AVAILABLE to the caller.
As a result, an attacker who streams JSON to a non-blocking parser in many small chunks, without ever sending a terminator byte, keeps the parser inside MINOR_NUMBER_INTEGER_DIGITS indefinitely. _textBuffer.expandCurrentSegment() grows the accumulator on every chunk while validateIntegerLength() is never called. The accumulator is bounded only by maxStringLength (20 MiB by default) rather than by maxNumberLength (1000 by default), an amplification of roughly 20,000x over the documented limit. Because Java char values occupy two bytes, a single connection can be driven to approximately 40 MiB of heap before the validator finally fires when the value completes.
The equivalent fraction-path code is correct: _finishFloatFraction() calls _setFractLength() before its NOT_AVAILABLE return. The missing call affects the integer-digit paths in _startPositiveNumber(), _startNegativeNumber() and _finishNumberIntegralPart() in NonBlockingUtf8JsonParserBase.
Impact: reactive frameworks such as Spring WebFlux/Reactor, Quarkus, Helidon and Vert.x feed inbound HTTP or gRPC bytes to the async parser as they arrive, which is precisely the chunked-feed shape required. Operators who set StreamReadConstraints.maxNumberLength expecting it to cap memory per number value do not get that guarantee; memory accumulates per concurrent connection and attacker-controlled concurrency can exhaust the JVM heap. The synchronous parsers (UTF8StreamJsonParser, ReaderBasedJsonParser) and the async parser operating on complete input are not affected.
Exploitation requires only the ability to stream data to a parsing endpoint; no privileges or user interaction are needed.
This issue affects com.fasterxml.jackson.core:jackson-core from version 2.15.0 through 2.18.7, and from 2.19.0 through 2.21.3, and tools.jackson.core:jackson-core from 3.0.0 through 3.1.3. Versions prior to 2.15.0 are not affected, because StreamReadConstraints -- which defines the maxNumberLength setting -- was first introduced in jackson-core 2.15.0, so no such constraint exists to be bypassed in earlier releases. Note that GHSA-r7wm-3cxj-wff9 states the affected 2.x range without a lower bound. The 2.22.x and 3.2.x release lines are not affected: those branches were created after the fix commit landed on 2026-05-21 and therefore contain it from their initial releases (2.22.0, tagged 2026-06-03, and 3.2.0, tagged 2026-06-08).
Publish Date: 2026-08-04
URL: CVE-2026-68494
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.372%
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-08-04
Fix Resolution (com.fasterxml.jackson.core:jackson-core): 2.21.4
Direct dependency fix Resolution (com.fasterxml.jackson.core:jackson-databind): 2.21.4
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.18.0 until 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1, UnwrappedPropertyHandler.processUnwrapped() replays buffered JSON for a @JsonUnwrapped property and calls prop.deserializeAndSet() without a prop.visibleInView(ctxt.getActiveView()) guard, allowing a property annotated with both @JsonView and @JsonUnwrapped to be written from attacker JSON under a less-privileged active view. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.
Publish Date: 2026-07-14
URL: CVE-2026-59889
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.346%
CVSS 3 Score Details (6.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: GHSA-5gvw-p9qm-jgwh
Release Date: 2026-07-14
Fix Resolution: 2.21.5
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.15.0 until 2.18.8, 2.21.4, and 3.1.4, Java Records using a PropertyNamingStrategy can bypass @JsonIgnore because POJOPropertiesCollector._removeUnwantedIgnorals() records an ignored component under its original implicit name before _renameUsing() applies the naming strategy, allowing the renamed JSON key to be assigned to the Record constructor parameter. This issue is fixed in versions 2.18.8, 2.21.4, and 3.1.4.
Publish Date: 2026-07-14
URL: CVE-2026-59888
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.309%
CVSS 3 Score Details (6.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: GHSA-3pjw-73gf-8qr5
Release Date: 2026-07-14
Fix Resolution: 2.21.4
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, UnwrappedPropertyHandler.processUnwrappedCreatorProperties() replays buffered JSON into creator parameters but never consults prop.visibleInView(activeView). The normal property-based creator path gates creator properties on the active view, but this unwrapped-creator replay path bypasses that check, so a constructor parameter annotated with both @JsonView(AdminView.class) and @JsonUnwrapped is populated from attacker JSON even when a more restrictive view is active. This vulnerability is fixed in 2.21.4 and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54518
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.354%
CVSS 3 Score Details (6.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
DefaultBaseTypeLimitingValidator is the PolymorphicTypeValidator applied automatically whenever @JsonTypeInfo is used without an explicitly configured custom validator. It denies polymorphic resolution only for a fixed set of "unsafe base types", and its isSafeSubType method returns true unconditionally for every base type outside that set. java.lang.Comparable was absent from the list despite being implemented by a very large fraction of JDK and application classes, comparable in breadth to java.io.Serializable, which is on the list for that reason. An application declaring an @JsonTypeInfo-annotated property or class with Comparable as its base type, and no custom PolymorphicTypeValidator, will accept a type identifier for essentially any class implementing Comparable. This yields an attacker-controlled object instantiation primitive; a demonstrated case constructs a java.io.File for an arbitrary attacker-chosen path, which becomes path-traversal-adjacent if the application subsequently calls path-sensitive methods on the value. No class implementing Comparable has been identified that yields code execution through deserialization alone. Global Default Typing via activateDefaultTyping is not affected, because that method structurally requires an explicit PolymorphicTypeValidator argument. This affects com.fasterxml.jackson.core:jackson-databind from 2.11.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2.
Publish Date: 2026-09-01
URL: CVE-2026-83557
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.586%
CVSS 3 Score Details (5.6)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: Low
- Availability Impact: Low
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: GHSA-gx83-3vf8-gh7j
Release Date: 2026-09-01
Fix Resolution: 2.21.6
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. Prior to versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1 on their respective release lines, the java.net.InetAddress branch of FromStringDeserializer.Std._deserialize() calls InetAddress.getByName() on attacker-controlled input, causing eager DNS resolution during deserialization and enabling DNS-based server-side request forgery and internal-host enumeration. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.
Publish Date: 2026-08-24
URL: CVE-2026-77310
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.187%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: None
- Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: GHSA-vvgp-rfg2-7rr6
Release Date: 2026-08-24
Fix Resolution: 2.21.5
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, in BeanDeserializer._deserializeUsingPropertyBased, the active-view (@JsonView) filter was applied only to creator properties; the regular property-buffering branch performed no prop.visibleInView(activeView) check. A change making SetterlessProperty.isMerging() return true routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted @JsonView is populated from attacker JSON even when the active view excludes it. This vulnerability is fixed in 2.21.4 and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54517
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.384%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, POJOPropertiesCollector._renameProperties() allows a property with @JsonProperty("renamed") on the getter and @JsonIgnore on the setter to be renamed rather than dropped. With MapperFeature.INFER_PROPERTY_MUTATORS enabled (default), the private backing field is retained; during deserialization BeanDeserializerFactory.addBeanProps() sees hasField()==true, builds a FieldProperty, and makes the backing field writable. An attacker supplying the renamed JSON key writes the backing field directly, bypassing the @JsonIgnore on the setter. This vulnerability is fixed in 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54516
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.449%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-3.1.4
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.8.0 until 2.18.9, 2.21.5, and 3.1.4, in BeanDeserializerBase.createContextual(), per-property @JsonIgnoreProperties exclusions are applied by _handleByNameInclusion(), producing a contextual deserializer whose BeanPropertyMap has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by @JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES)) rebuilds from this._beanProperties (the original, unfiltered map) instead of contextual._beanProperties, then overwrites the filtered map — restoring every property _handleByNameInclusion had just removed. The ignored property becomes writable again. This vulnerability is fixed in 2.18.9, 2.21.5, and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54515
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.373%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: 2.21.5
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.0.0 until 2.18.8, 2.21.4, and 3.1.4, JDKFromStringDeserializer constructed InetSocketAddress with new InetSocketAddress(host, port), which performs eager DNS name resolution for hostname inputs at deserialization time. An application that binds untrusted JSON into a type containing an InetSocketAddress field issues an attacker-chosen DNS query during readValue, before any application-level validation or connect logic. The fix uses InetSocketAddress.createUnresolved(host, port), deferring DNS to an explicit connect. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Publish Date: 2026-06-23
URL: CVE-2026-54514
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.368%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: Low
- Integrity Impact: None
- Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-06-23
Fix Resolution: https://github.com/FasterXML/jackson-databind.git - jackson-databind-2.18.8
⛑️ Automatic Remediation will be attempted for this issue.
Vulnerable Library - jackson-databind-2.21.0.jar
General data-binding functionality for Jackson: works on core streaming API
Library home page: https://github.com/FasterXML/jackson
Sample Path to Dependency File: /build.gradle
Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.21.0/a6b96ee168ca8734a293b6dc70acd5d495119521/jackson-databind-2.21.0.jar
Dependency Hierarchy:
Found in base branch: main
Vulnerability Details
jackson-databind's deserializer for java.nio.file.Path resolves an attacker-supplied URI without restricting the URI scheme. In JDKFromStringDeserializer.NioPathHelper.deserialize, a string bound from untrusted JSON is passed to new URI(value) and then to Path.of(uri). When that throws FileSystemNotFoundException, the code enumerates ServiceLoader and calls provider.getPath(uri) on the first provider whose scheme matches the attacker-chosen scheme. Untrusted JSON can therefore select and drive an arbitrary registered FileSystemProvider during readValue under a default JsonMapper, and forces provider class loading at the same time. With only the JDK built-in providers (file, jar/zipfs) present, the resolved path is inert and no mount or network I/O occurs; further impact requires a side-effecting third-party FileSystemProvider on the classpath. This affects com.fasterxml.jackson.core:jackson-databind from 2.8.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2. Binding java.nio.file.Path from untrusted JSON should be avoided regardless of version.
Publish Date: 2026-09-01
URL: CVE-2026-19032
Threat Assessment
Exploit Maturity: Not Defined
EPSS: 0.463%
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: Low
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: GHSA-wjgm-6hv5-3cvf
Release Date: 2026-09-01
Fix Resolution: 2.21.6
⛑️ Automatic Remediation will be attempted for this issue.
⛑️Automatic Remediation will be attempted for this issue.