CVE-2026-72816

Description

go-chi/chi through 5.2.1 contains an IP spoofing vulnerability in the RealIP middleware (middleware/realip.go). The realIP() function reads client-controlled headers (True-Client-IP, X-Real-IP, and X-Forwarded-For) and overwrites r.RemoteAddr without verifying that the request originated from a trusted proxy. Attackers can supply arbitrary IP addresses in these headers to bypass IP-based access controls, evade rate limiting and geo-IP restrictions, and pollute audit logs. Fixed in 5.3.0.

References

https://www.vulncheck.com/advisories/go-chi-chi-before-ip-spoofing-via-realip-middleware

https://github.com/go-chi/chi/security/advisories/GHSA-rjr7-jggh-pgcp

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4