Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef

Summary There is a medium severity vulnerability in Traefik's Kubernetes CRD provider. When providers.kubernetesCRD.allowCrossNamespace is disabled — the default — cross-namespace @kubernetescrd references are rejected for middlewares, TLS options and HTTP/TCP ServersTransports, but the same...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization in the evaluation of the crossProviderNamespaces allowlist within the Kubernetes Gateway provider. An attacker can gain unauthorized access to internal services by creating an HTTPRoute in a non-allow-listed...

traefik -- Unauthorized exposure of the REST provider

The traefik project releases a new version addressing a CVE: CVE-2026-44774 Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider...