CVE-2026-72815
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
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| go-chi | chi | 5.2.1 < 5.3.0 | affected |
| go-chi | chi | 5.3.0 | unaffected |
Weaknesses
- CWE-290: Authentication Bypass by Spoofing
References
- https://github.com/go-chi/chi/security/advisories/GHSA-3fxj-6jh8-hvhx
- https://www.vulncheck.com/advisories/go-chi-chi-ip-spoofing-via-x-forwarded-for-header
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