CVE-2026-72817 — go-chi chi 0.9.0 before 5.3.0 IP Spoofing via X-Forwarded-For
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 …
Published: 2026-08-14 · CVSS: 6.9 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7