CVE-2026-114640
CVE-2026-114640 · Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX HTTP Router
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerability in its Kubernetes Ingress-NGINX provider that forwards client-supplied Ssl-Client-* headers on the plaintext HTTP router. When ssl-redirect is disabled alongside auth-tls-pass-certificate-to-upstream, unauthenticated attackers can send Ssl-Client-Verify: SUCCESS with a chosen certificate subject and issuer to impersonate mTLS identities.
CVSS 7.0 · High · EPSS 0.2% · Fix available
- Published
- Updated
Stack: web
Affected products and versions
traefik
- Versions
- ≥ 3.7.0, < 3.7.14: Affected (semver)
- 3.7.14: Not affected (semver)
Update to 3.7.14