CVE-2026-114437
CVE-2026-114437 · Chi Client IP Spoofing in ClientIPFromXFF via X-Forwarded-For
This page contains facts from public vulnerability sources. Check the original advisory before updating.
In the Golang Chi web framework, the ClientIPFromXFF middleware skips any X-Forwarded-For entry in a configured trusted CIDR but never verifies that the direct TCP peer in http.Request.RemoteAddr belongs to that CIDR. A client that can reach the Go server directly can therefore append a trusted-looking proxy address and choose the client IP returned by middleware.GetClientIP. This issue affects chi before 5.4.0.
CVSS 6.3 · Medium · EPSS 0.1% · Public exploit · Fix available
- Published
- Updated
Stack: system
Affected products and versions
chi
- Versions
- ≥ 0, < 5.4.0: Affected (semver)
Update to 5.4.0
golang-github-go-chi-chi Debian:12
- Versions
- 5.0.7-1
- 5.1.0-1
- 5.2.0-1
- 5.2.3-1
- 5.2.5-1
- 5.3.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-go-chi-chi Debian:13
- Versions
- 5.2.0-1
- 5.2.3-1
- 5.2.5-1
- 5.3.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-go-chi-chi Debian:14
- Versions
- 5.2.0-1
- 5.2.3-1
- 5.2.5-1
- 5.3.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-go-chi-chi Ubuntu:22.04:LTS
- Versions
- 1.5.1-2
- 5.0.7-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-go-chi-chi Ubuntu:24.04:LTS
- Versions
- 5.0.7-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-go-chi-chi Ubuntu:26.10
- Versions
- 5.2.3-1
- 5.3.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-go-chi-chi Ubuntu:26.04:LTS
- Versions
- 5.2.0-1
- 5.2.3-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published