Traefik CRD IngressRouteTCP ServersTransport Cross-Provider Namespace Bypass

Summary There is a medium-severity cross-provider reference vulnerability in Traefik's Kubernetes CRD provider. The crossProviderNamespaces allowlist is enforced for HTTP serversTransport references but was not enforced for IngressRouteTCP service serversTransport references. A low-privileged...

Duplicate Advisory: Traefik CRD IngressRouteTCP ServersTransport Cross-Provider Namespace Bypass

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-42cj-m3vj-89wv. This link is maintained to preserve external references. Original Description Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for...

CVE-2026-65602 Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references the allowlist was only enforced for HTTP serversTransport references. A low-privileged Kubernetes user in a namespace not listed in...

CVE-2026-65602

Traefik (3.6.0–3.6.22 and 3.7.0–3.7.6) fails to enforce crossProviderNamespaces allowlist for IngressRouteTCP serversTransport, permitting a low-privilege namespace user to set serversTransport: foo@file on an IngressRouteTCP service. This can cause Traefik to accept a cross-provider reference an...

CVE-2026-65602

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references the allowlist was only enforced for HTTP serversTransport references. A low-privileged Kubernetes user in a namespace not listed in...

CVE-2026-65602 Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references the allowlist was only enforced for HTTP serversTransport references. A low-privileged Kubernetes user in a namespace not listed in...

PT-2026-63360

Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references the allowlist was only enforced for HTTP serversTransport references. A low-privileged Kubernetes user in a namespace not listed in...