CVE-2026-72816

A flaw was found in the go-chi/chi RealIP middleware. This vulnerability allows a remote attacker to perform IP spoofing by supplying arbitrary IP addresses in client-controlled headers. This can lead to bypassing IP-based access controls, evading rate limiting and geo-IP restrictions, and...

CVE-2026-72816 go-chi chi before 5.3.0 IP Spoofing via RealIP Middleware

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...

CVE-2026-72816

The CVE-2026-72816 affects go-chi/chi up to version 5.2.1, specifically the RealIP middleware (realip.go). The realIP() function reads client-controlled headers (True-Client-IP, X-Real-IP, X-Forwarded-For) and overwrites r.RemoteAddr without validating the origin of the request from a trusted pro...