CVE-2026-35051
Traefik: ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass auth
CVSS Score
8.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-345 |
| Vendor | traefik |
| Product | traefik |
| Published | Apr 30, 2026 |
| Last Updated | Jul 15, 2026 |
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Affected Versions
traefik / traefik
< 2.11.43 >= 3.0.0-beta1, < 3.6.14 >= 3.7.0-ea.1, < 3.7.0-rc.2
References
github.com: https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54 github.com: https://github.com/traefik/traefik/releases/tag/v2.11.43 github.com: https://github.com/traefik/traefik/releases/tag/v3.6.14 github.com: https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-35051 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2464235 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35051.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:21772