Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Traefik | Traefik | < 2.11.43 |
Related Weaknesses (CWE)
References
- https://github.com/traefik/traefik/releases/tag/v2.11.43ProductRelease Notes
- https://github.com/traefik/traefik/releases/tag/v3.6.14ProductRelease Notes
- https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2ProductRelease Notes
- https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54ExploitPatchVendor Advisory
FAQ
What is CVE-2026-35051?
CVE-2026-35051 is a vulnerability with a CVSS score of 10.0 (CRITICAL). 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 trustFor...
How severe is CVE-2026-35051?
CVE-2026-35051 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-35051?
Check the references section above for vendor advisories and patch information. Affected products include: Traefik Traefik.