CVE-2026-72815: Go-Chi Chi

Medium severity, CVSS 6.9. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Go-Chi Chi: from 5.2.1, before 5.3.0 (fixed in 5.3.0)

Published 2026-08-14. Last modified 2026-10-08.