VDB
CVE-2026-72815
CVE-2026-72815
PUBLISHED
CVSS 6.9 MEDIUM
Reported by VulnCheck · Published August 14, 2026
go-chi chi versions >= 5.2.1 and before 5.3.0 contain an IP spoofing vulnerability in the RealIP middleware, which blindly trusts the first (leftmost) value of the X-Forwarded-For HTTP header. A remote attacker can bypass IP-based access control lists and rate-limiting mechanisms, and forge log entries, by supplying a spoofed IP address in the X-Forwarded-For header. The issue is fixed in version 5.3.0.
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 | 5.2.1, 5.3.0 |
| go-chi | chi | 5.2.1, 5.3.0, 5.2.1 |
Timeline
- Aug 14, 2026 Coalition ESS Score
- Aug 14, 2026 CVE Published
- Aug 18, 2026 CVE Updated
- Aug 20, 2026 Security Advisory
- Aug 24, 2026 EPSS Score
- Aug 26, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 3, 2026 EPSS Score
- Sep 7, 2026 EPSS Score
- Sep 9, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 16, 2026 EPSS Score
References
- GitHub Security Advisory (GHSA-3fxj-6jh8-hvhx) vendor-advisory
- VulnCheck Advisory: go-chi chi v5.2.1 IP Spoofing via X-Forwarded-For Header third-party-advisory