CVE-2026-44774
CriticalCVSS 9.9Exploitation Probability (EPSS)
Low risk36th percentile — higher than 36% of all known CVEs
Summary
A vulnerability in Traefik allows a user with HTTPRoute creation permissions in the Kubernetes Gateway API provider to bypass the providers.rest.insecure=false setting and access the REST provider handler. By referencing a TraefikService backend whose name ends with @internal, traffic can be routed to rest@internal, enabling unauthorized reconfiguration of routers and services in shared Gateway deployments.
Risk Assessment
The organization faces the risk of a low-privileged actor gaining live dynamic configuration write access to Traefik, potentially leading to unauthorized traffic redirection, data leakage, or service disruption.
Recommendation
Immediately upgrade Traefik to version 2.11.46, 3.6.17, or 3.7.1, depending on the branch in use. As a workaround, restrict access to the Kubernetes Gateway API and disable the REST provider if not required.
Original NVD description (English source)
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.