Security context

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

gin-gonic/gin
master @ d75fcd4
10
Fixes
5
CVEs
HIGH
Peak severity
40.0%
Coverage
Highlights
Denial of Service: 3 prior fixes. Scrutinize any change in this area.
context.go: most-fixed (6 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.

IP Address Spoofing: Trusting untrusted or improperly formatted upstream HTTP proxy headers allows clients to spoof their source IP addresses, bypassing security controls. Joining multiple headers prior to validation and enforcing robust proxy filters is necessary to prevent spoofing.
Denial of Service: Unchecked dereferencing of optional request structures (like Request.URL) and invoking empty handler indices in middleware chains can cause application panics that bring down the Gin engine.
Race Condition: When copying contexts (e.g., using Context.Copy() across goroutines), sharing underlying slice or map structures (like Params or Keys) leads to concurrent map writes and data-corruption panics, as well as parameter pollution.