diff --git a/backend/app/modules/idea/service.py b/backend/app/modules/idea/service.py
index 89f2a123..417776d1 100644
--- a/backend/app/modules/idea/service.py
+++ b/backend/app/modules/idea/service.py
@@ -6504,19 +6504,19 @@ def _parse_ideas(self, session_id: str, text: str, max_count: int) -> List[IdeaC
                     try:
                         score = float(''.join(c for c in line if c.isdigit() or c == '.'))
                         current_idea["novelty"] = min(10, max(0, score))
-                    except:
+                    except (ValueError, IndexError):
                         current_idea["novelty"] = 7.0
                 elif "feasibility" in lower and "score" in lower:
                     try:
                         score = float(''.join(c for c in line if c.isdigit() or c == '.'))
                         current_idea["feasibility"] = min(10, max(0, score))
-                    except:
+                    except (ValueError, IndexError):
                         current_idea["feasibility"] = 7.0
                 elif "impact" in lower and "score" in lower:
                     try:
                         score = float(''.join(c for c in line if c.isdigit() or c == '.'))
                         current_idea["impact"] = min(10, max(0, score))
-                    except:
+                    except (ValueError, IndexError):
                         current_idea["impact"] = 7.0
         
         # Don't forget the last idea
diff --git a/backend/tests/test_pr_09_idea_score_except.py b/backend/tests/test_pr_09_idea_score_except.py
new file mode 100644
index 00000000..2392f017
--- /dev/null
+++ b/backend/tests/test_pr_09_idea_score_except.py
@@ -0,0 +1,57 @@
+"""
+Test that idea score parsing uses typed exceptions (ValueError, IndexError)
+instead of bare except: clauses, and correctly parses score lines.
+"""
+
+import unittest
+
+
+class TestIdeaScoreParsing(unittest.TestCase):
+    """Tests for the score parsing logic extracted from idea/service.py."""
+
+    def _parse_score(self, line, default=7.0):
+        """Replicate the score parsing logic from service.py."""
+        try:
+            chars = "".join(c for c in line if c.isdigit() or c == ".")
+            score = float(chars)
+            return min(10, max(0, score))
+        except (ValueError, IndexError):
+            return default
+
+    def test_line_with_digits(self):
+        """A line with a numeric score should parse correctly."""
+        self.assertEqual(self._parse_score("Novelty score: 8"), 8.0)
+
+    def test_line_with_decimal(self):
+        """A line with a decimal score should parse correctly."""
+        self.assertAlmostEqual(self._parse_score("Feasibility score: 7.5"), 7.5)
+
+    def test_line_without_digits_falls_back(self):
+        """A line with no digits should fall back to the default."""
+        self.assertEqual(self._parse_score("Novelty score: unknown"), 7.0)
+
+    def test_empty_string_falls_back(self):
+        """An empty line (filter produces empty string) should fall back."""
+        self.assertEqual(self._parse_score("score: "), 7.0)
+
+    def test_score_clamped_to_10(self):
+        """Scores above 10 should be clamped."""
+        self.assertEqual(self._parse_score("Impact score: 15"), 10.0)
+
+    def test_score_clamped_to_0(self):
+        """Zero is the minimum."""
+        self.assertEqual(self._parse_score("Score: 0"), 0.0)
+
+    def test_does_not_catch_keyboard_interrupt(self):
+        """Verify that KeyboardInterrupt is NOT caught by the typed except."""
+        try:
+            try:
+                raise KeyboardInterrupt()
+            except (ValueError, IndexError):
+                self.fail("KeyboardInterrupt should not be caught")
+        except KeyboardInterrupt:
+            pass  # Expected: KeyboardInterrupt propagated
+
+
+if __name__ == "__main__":
+    unittest.main()