CVE-2026-35051
CVE-2026-35051 · Traefik: ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass auth
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.8 · High · EPSS 0.3%
- Published
- Updated
Stack: web
Affected products and versions
traefik
- Versions
- < 2.11.43: Affected
- >= 3.0.0-beta1, < 3.6.14: Affected
- >= 3.7.0-ea.1, < 3.7.0-rc.2: Affected
No fix published
Original sources
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2026-35051