Security context

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

nghttp2/nghttp2

              master @ b6729c4
            

Fixes

CVEs

CRITICAL

Peak severity

50.0%

Coverage

Highlights

Memory Corruption: 12 prior fixes. Scrutinize any change in this area.

lib/nghttp2_session.c: most-fixed (17 issues). Treat as high-risk during review.

54 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.

Memory Corruption: The highest concentration of fixes targets the HTTP/2 session parser, with multiple out-of-bounds writes/reads from incorrect frame length, padding, and SETTINGS payload handling.

Use-After-Free: Multiple fixes address dangling stream pointers and data detachment issues, indicating fragile lifetime management in the session's outbound queue and callback invocation.

Improper Certificate Validation: A large cluster of fixes concerns OCSP response verification and hostname matching (wildcards, trailing dots, SNI), showing a history of incomplete or incorrect TLS validation logic.