Security context

What an agent needs to avoid regressing past fixes and find the next vuln in this repo.

symfony/security-csrf

              8.2 @ c865a8e
            

Fixes

CVEs

MEDIUM

Peak severity

Highlights

Auth Bypass: 2 prior fixes. Scrutinize any change in this area.

CsrfTokenManager: most-fixed (2 issues). Treat as high-risk during review.

0 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: Logic flaws in session state validation and bitwise flags calculation can prevent the proper persistence of CSRF tokens, leading to silent auth bypasses or weakened protection states.

Weak Cryptographic Key Generation: Generating tokens using deprecated random sources or insufficient entropy checks can result in guessable CSRF tokens, compromising the entire CSRF defense model.

Denial of Service: Improper validation of malformed or empty incoming keys during token XOR operations can result in a division-by-zero fatal error, causing application-wide denial of service.