Highlights
Auth Bypass: 1 prior fix. Scrutinize any change in this area.
securecookie.go: most-fixed (3 issues). Treat as high-risk during review.
1 high-severity fix 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: Passing an empty but non-nil byte slice as the hashKey bypassed the missing-key validation check, potentially enabling insecure cookie signing configurations. Ensure all key parameters are validated for non-zero length.
Timing Attack: Side-channel leaks in cookie decoding allowed potential information harvesting by returning early on validation failures instead of maintaining a constant-time execution path. Ensure uniform control flow during MAC verification.
Cryptographic Issues: Absence of length checks prior to calling subtle.ConstantTimeCompare could expose the application to timing-based oracle attacks in specific runtimes. Validate slice length equality before cryptographic comparison.