Highlights
Auth Bypass: 5 prior fixes. Scrutinize any change in this area.
src/JWT/Action/VerifyIdToken/WithLcobucciJWT.php: most-fixed (4 issues). Treat as high-risk during review.
6 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.
Signature Validation Bypass: A critical logical inversion in the verifier bypassed cryptographic signature verification entirely in production environments, trusting unverified payloads unless specifically running inside an emulator.
Auth Bypass: Flawed issuer validation (IssuedBy constraint) allowed distinct token types, such as Firebase session cookies, to be accepted incorrectly as ID tokens, compromising identity boundaries.
Auth Bypass: Failing to assert that incoming tokens were concrete 'Plain' tokens before accessing claims allowed non-plain tokens to skip standard claim-based validation checks.