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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.

PUBLISHED Reserved 2026-03-31 | Published 2026-04-30 | Updated 2026-05-01 | Assigner GitHub_M




HIGH: 7.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N

Problem types

CWE-345: Insufficient Verification of Data Authenticity

Product status

< 2.11.43
affected

>= 3.0.0-beta1, < 3.6.14
affected

>= 3.7.0-ea.1, < 3.7.0-rc.2
affected

References

github.com/...raefik/security/advisories/GHSA-6384-m2mw-rf54

github.com/traefik/traefik/releases/tag/v2.11.43

github.com/traefik/traefik/releases/tag/v3.6.14

github.com/traefik/traefik/releases/tag/v3.7.0-rc.2

cve.org (CVE-2026-35051)

nvd.nist.gov (CVE-2026-35051)

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