7.8
High
CVE-2026-35051 Traefik is an HTTP reverse proxy and load balancer
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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| traefik 3.7 | 3.7.0-ea.1 → < 3.7.0-rc.2 | 3.7.0-rc.2 |
| traefik 3.0 | 3.0.0-beta1 → < 3.6.14 | 3.6.14 |
| traefik 2.11 | earliest → < 2.11.43 | 2.11.43 |
| Red Hat OpenShift Dev Spaces 3.28 1779786779 | earliest → < 1779786779 | 1779786779 |
Other CVEs of traefik
The 80 CVEs of traefik →
CVE-2026-121966
Traefik before 2.11.60 and 3.7.16 ForwardAuth NTLM/Negotiate Identity Leak
7.0
High
CVE-2026-119574
Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows unauthenticated…
8.2
High
CVE-2026-119573
Traefik 3.7.11 before 3.7.15 contains an authorization bypass in the Kubernetes Ingress NGINX provider that skips the…
2.1
Low
CVE-2026-119572
Traefik 3.7.0-ea.1 before 3.7.15 mTLS Bypass via Ingress NGINX Provider
7.0
High