Highlights
Auth Bypass: 1 prior fix. Scrutinize any change in this area.
lib/signer.js: most-fixed (3 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: Attackers can manipulate request header structures to bypass signature checks if header names are omitted from the signing string, allowing message modification without invalidating the signature.
Cryptographic Issues: The system could silently generate empty signatures when supplied with invalid or public keys, giving downstream consumers a false sense of security while transmitting unsigned payloads.
Timing Attack: Standard string comparison operators (===) expose signature verification to timing side-channels, allowing attackers to incrementally guess valid signatures.