Update dependency undici to v6.24.0 [SECURITY] by renovate[bot] · Pull Request #173 · apollographql/docs-examples

renovate · 2026-08-26T11:17:07Z

ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package	Change	Age	Confidence
undici (source)	`6.14.1` → `6.24.0`

CRLF Injection in Nodejs ‘undici’ via host

CVE-2023-23936 / GHSA-5r9g-qh6m-jxff

More information

Details

Impact

undici library does not protect host HTTP header from CRLF injection vulnerabilities.

Patches

This issue was patched in Undici v5.19.1.

Workarounds

Sanitize the headers.host string before passing to undici.

References

Reported at https://hackerone.com/reports/1820955.

Credits

Thank you to Zhipeng Zhang (@timon8) for reporting this vulnerability.

Severity

CVSS Score: 4.6 / 10 (Medium)
Vector String: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Undici's cookie header not cleared on cross-origin redirect in fetch

CVE-2023-45143 / GHSA-wqq4-5wpv-mx2g

More information

Details

Impact

Undici clears Authorization headers on cross-origin redirects, but does not clear Cookie headers. By design, cookie headers are forbidden request headers, disallowing them to be set in RequestInit.headers in browser environments. Since Undici handles headers more liberally than the specification, there was a disconnect from the assumptions the spec made, and Undici's implementation of fetch.

As such this may lead to accidental leakage of cookie to a 3rd-party site or a malicious attacker who can control the redirection target (ie. an open redirector) to leak the cookie to the 3rd party site.

Patches

This was patched in e041de359221ebeae04c469e8aff4145764e6d76, which is included in version 5.26.2.

Severity

CVSS Score: 3.9 / 10 (Low)
Vector String: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Undici proxy-authorization header not cleared on cross-origin redirect in fetch

CVE-2024-24758 / GHSA-3787-6prv-h9w3

More information

Details

Impact

Undici already cleared Authorization headers on cross-origin redirects, but did not clear Proxy-Authorization headers.

Patches

This is patched in v5.28.3 and v6.6.1

Workarounds

There are no known workarounds.

References

Severity

CVSS Score: 3.9 / 10 (Low)
Vector String: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Undici's fetch with integrity option is too lax when algorithm is specified but hash value is in incorrect

CVE-2024-30261 / GHSA-9qxr-qj54-h672

More information

Details

Impact

If an attacker can alter the integrity option passed to fetch(), they can let fetch() accept requests as valid even if they have been tampered.

Patches

Fixed in nodejs/undici@d542b8c.
Fixes has been released in v5.28.4 and v6.11.1.

Workarounds

Ensure that integrity cannot be tampered with.

References

https://hackerone.com/reports/2377760

Severity

CVSS Score: 2.6 / 10 (Low)
Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Undici's Proxy-Authorization header not cleared on cross-origin redirect for dispatch, request, stream, pipeline

CVE-2024-30260 / GHSA-m4v8-wqvr-p9f7

More information

Details

Impact

Undici cleared Authorization and Proxy-Authorization headers for fetch(), but did not clear them for undici.request().

Patches

This has been patched in nodejs/undici@6805746.
Fixes has been released in v5.28.4 and v6.11.1.

Workarounds

use fetch() or disable maxRedirections.

References

Linzi Shang reported this.

Severity

CVSS Score: 3.9 / 10 (Low)
Vector String: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Undici vulnerable to data leak when using response.arrayBuffer()

CVE-2024-38372 / GHSA-3g92-w8c5-73pq

More information

Details

Impact

Depending on network and process conditions of a fetch() request, response.arrayBuffer() might include portion of memory from the Node.js process.

Patches

This has been patched in v6.19.2.

Workarounds

There are no known workaround.

References

https://github.com/nodejs/undici/issues/3337
https://github.com/nodejs/undici/issues/3328
https://github.com/nodejs/undici/pull/3338
nodejs/undici@f979ec3

Severity

CVSS Score: 2.0 / 10 (Low)
Vector String: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Use of Insufficiently Random Values in undici

CVE-2025-22150 / GHSA-c76h-2ccp-4975

More information

Details

Impact

Undici fetch() uses Math.random() to choose the boundary for a multipart/form-data request. It is known that the output of Math.random() can be predicted if several of its generated values are known.

If there is a mechanism in an app that sends multipart requests to an attacker-controlled website, they can use this to leak the necessary values. Therefore, An attacker can tamper with the requests going to the backend APIs if certain conditions are met.

Patches

This is fixed in 5.28.5; 6.21.1; 7.2.3.

Workarounds

Do not issue multipart requests to attacker controlled servers.

References

Severity

CVSS Score: 6.8 / 10 (Medium)
Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

undici Denial of Service attack via bad certificate data

CVE-2025-47279 / GHSA-cxrh-j4jr-qwg3

More information

Details

Impact

Applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak.

Patches

This has been patched in https://github.com/nodejs/undici/pull/4088.

Workarounds

If a webhook fails, avoid keep calling it repeatedly.

References

Reported as: https://github.com/nodejs/undici/issues/3895

Severity

CVSS Score: 3.1 / 10 (Low)
Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Undici: Malicious WebSocket 64-bit length overflows parser and crashes the client

CVE-2026-1528 / GHSA-f269-vfmq-vjvj

More information

Details

Impact

A server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.

Patches

Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.

Workarounds

There are no workarounds.

Severity

CVSS Score: 7.5 / 10 (High)
Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Undici has an HTTP Request/Response Smuggling issue

CVE-2026-1525 / GHSA-2mjp-6q6p-2qxm

More information

Details

Impact

Undici allows duplicate HTTP Content-Length headers when they are provided in an array with case-variant names (e.g., Content-Length and content-length). This produces malformed HTTP/1.1 requests with multiple conflicting Content-Length values on the wire.

Who is impacted:

Applications using undici.request(), undici.Client, or similar low-level APIs with headers passed as flat arrays
Applications that accept user-controlled header names without case-normalization

Potential consequences:

Denial of Service: Strict HTTP parsers (proxies, servers) will reject requests with duplicate Content-Length headers (400 Bad Request)
HTTP Request Smuggling: In deployments where an intermediary and backend interpret duplicate headers inconsistently (e.g., one uses the first value, the other uses the last), this can enable request smuggling attacks leading to ACL bypass, cache poisoning, or credential hijacking

Patches

Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.

Workarounds

If upgrading is not immediately possible:

Validate header names: Ensure no duplicate Content-Length headers (case-insensitive) are present before passing headers to undici
Use object format: Pass headers as a plain object ({ 'content-length': '123' }) rather than an array, which naturally deduplicates by key
Sanitize user input: If headers originate from user input, normalize header names to lowercase and reject duplicates

Severity

CVSS Score: 6.5 / 10 (Medium)
Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Undici has CRLF Injection in undici via `upgrade` option

CVE-2026-1527 / GHSA-4992-7rv2-5pvq

More information

Details

Impact

When an application passes user-controlled input to the upgrade option of client.request(), an attacker can inject CRLF sequences (\r\n) to:

Inject arbitrary HTTP headers
Terminate the HTTP request prematurely and smuggle raw data to non-HTTP services (Redis, Memcached, Elasticsearch)

The vulnerability exists because undici writes the upgrade value directly to the socket without validating for invalid header characters:

// lib/dispatcher/client-h1.js:1121
if (upgrade) {
  header += `connection: upgrade\r\nupgrade: ${upgrade}\r\n`
}

Patches

Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.

Workarounds

Sanitize the upgrade option string before passing to undici:

function sanitizeUpgrade(value) {
  if (/[\r\n]/.test(value)) {
    throw new Error('Invalid upgrade value')
  }
  return value
}

client.request({
  upgrade: sanitizeUpgrade(userInput)
})

Severity

CVSS Score: 4.6 / 10 (Medium)
Vector String: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Release Notes

nodejs/undici (undici)

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renovate Bot commented Aug 26, 2026

CRLF Injection in Nodejs ‘undici’ via host

Details

Impact

Patches

Workarounds

References

Credits

Severity

References

Undici's cookie header not cleared on cross-origin redirect in fetch

Details

Impact

Patches

Severity

References

Undici proxy-authorization header not cleared on cross-origin redirect in fetch

Details

Impact

Patches

Workarounds

References

Severity

References

Undici's fetch with integrity option is too lax when algorithm is specified but hash value is in incorrect

Details

Impact

Patches

Workarounds

References

Severity

References

Undici's Proxy-Authorization header not cleared on cross-origin redirect for dispatch, request, stream, pipeline

Details

Impact

Patches

Workarounds

References

Severity

References

Undici vulnerable to data leak when using response.arrayBuffer()

Details

Impact

Patches

Workarounds

References

Severity

References

Use of Insufficiently Random Values in undici

Details

Impact

Patches

Workarounds

References

Severity

References

undici Denial of Service attack via bad certificate data

Details

Impact

Patches

Workarounds

References

Severity

References

Undici: Malicious WebSocket 64-bit length overflows parser and crashes the client

Details

Impact

Patches

Workarounds

Severity

References

Undici has an HTTP Request/Response Smuggling issue

Details

Impact

Patches

Workarounds

Severity

References

Undici has CRLF Injection in undici via `upgrade` option