CVE-2026-44774: Traefik

Critical severity, CVSS 9.9. EPSS: 0.6% chance of exploitation in the next 30 days.

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.46, 3.6.17, and 3.7.1, Traefik's Kubernetes Gateway API provider allows a tenant with HTTPRoute creation permissions to expose the REST provider handler, bypassing the providers.rest.insecure=false setting. The Gateway provider accepts any TraefikService backend reference whose name ends with @internal, making it possible to route traffic to rest@internal in addition to the intended api@internal. In shared Gateway deployments where the REST provider is enabled, this allows a low-privileged actor to gain live dynamic configuration write access to Traefik, enabling unauthorized reconfiguration of routers and services. This vulnerability is fixed in 2.11.46, 3.6.17, and 3.7.1.

Affected products

• Traefik Traefik: before 2.11.46 (fixed in 2.11.46); from 3.0.0, before 3.6.17 (fixed in 3.6.17); from 3.7.0, before 3.7.1 (fixed in 3.7.1)

Published 2026-05-15. Last modified 2026-07-15.