Security context
What an agent needs to avoid regressing past fixes and find the next vuln in this repo.
marshmallow-code/marshmallow
dev @ 7bb19f0
12
Fixes
1
CVEs
HIGH
Peak severity
Highlights
Denial of Service: 7 prior fixes. Scrutinize any change in this area.
marshmallow/fields.py: most-fixed (4 issues). Treat as high-risk during review.
2 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Auth Bypass: Schemas failed to guarantee sequence structures during validation, allowing generators to bypass checks. Additionally, domain object instantiation occurred before postprocessing validated user inputs completely.
Auth Bypass: Custom validator functions returning None instead of explicitly False bypassed validation checks, allowing invalid or malicious payloads to be marked as clean.
Denial of Service: Deserializers frequently fail to catch platform-level exceptions (like UnicodeDecodeError during string conversions or ValueError during UUID parsing), leading to uncaught exceptions that crash the parsing thread.