CVE-2026-72817

Description

go-chi/chi versions 0.9.0 before 5.3.0 contains an IP spoofing vulnerability in the RealIP middleware, which resolves the request source IP (Request.RemoteAddr) using the first IP in the X-Forwarded-For header without validating trusted proxies. A malicious client can prepend a forged IP as the first value of the X-Forwarded-For header to spoof the request source IP, potentially bypassing access controls or falsifying request logs.

References

https://www.vulncheck.com/advisories/go-chi-chi-before-ip-spoofing-via-x-forwarded-for

https://github.com/go-chi/chi/security/advisories/GHSA-9g5q-2w5x-hmxf

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4