VDB
CVE-2026-72817
CVE-2026-72817
PUBLISHED
CVSS 6.9 MEDIUM
Reported by VulnCheck · Published August 14, 2026
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.
Risk Scores
CVSS 4.0
6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| go-chi | chi | 0.9.0, 5.3.0 |
| go-chi | chi | 0.9.0, 5.3.0, 0.9.0 |
Timeline
- Aug 14, 2026 Coalition ESS Score
- Aug 14, 2026 CVE Published
- Aug 20, 2026 Security Advisory
- Aug 24, 2026 EPSS Score
- Aug 27, 2026 EPSS Score
- Sep 24, 2026 EPSS Score
- Sep 26, 2026 EPSS Score
- Oct 2, 2026 EPSS Score
- Oct 6, 2026 EPSS Score
- Oct 8, 2026 CVE Updated
References
- GitHub Security Advisory (GHSA-9g5q-2w5x-hmxf) vendor-advisory
- VulnCheck Advisory: go-chi chi 0.9.0 before 5.3.0 IP Spoofing via X-Forwarded-For third-party-advisory