Description
Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
traefik traefik
< 2.11.43affected>= 3.0.0-beta1, < 3.6.14affected>= 3.7.0-ea.1, < 3.7.0-rc.2affected
References
- https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54 ↗
- https://github.com/traefik/traefik/releases/tag/v2.11.43 ↗
- https://github.com/traefik/traefik/releases/tag/v3.6.14 ↗
- https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2 ↗
- https://access.redhat.com/security/cve/CVE-2026-35051 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2464235 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35051.json ↗
- https://access.redhat.com/errata/RHSA-2026:21772 ↗