VULNERABILITY INTELLIGENCE

CVE-2026-72817

CVSS score6.5 MEDIUM
EPSS probability0.24%
CISA KEVNot currently listed
Published2026-08-14
Last modified2026-10-08
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-345

Primary references