PT-2026-68960

Summary There is a high severity vulnerability in Traefik's Kubernetes Gateway API provider. Router and service identities for HTTPRoute, GRPCRoute, TCPRoute and TLSRoute objects were built by hyphen-concatenating the route namespace, the route name, the Gateway identity, the entry point and the...

CVE-2026-71327: Use of Multiple Resources with Duplicate Identifier

Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization through improper namespace resolution in the extensionRef process. An attacker can cause unauthorized middleware from a backend namespace to be bound to a route by crafting a malicious HTTPRoute with...

PT-2026-68799

Name of the Vulnerable Software and Affected Versions Traefik versions prior to 3.6.25 Traefik versions prior to 3.7.10 Description Traefik's Kubernetes Gateway API provider incorrectly constructs router and service identities for HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute objects by...

CVE-2026-54765

A flaw was found in Traefik's Kubernetes Gateway API provider. An attacker capable of creating an accepted HTTPRoute that shares the same backend Service and port could exploit this vulnerability. The system may incorrectly apply the attacker's route filter context to another route's requests,...

GHSA-6MXQ-JR92-3H2R Duplicate Advisory: Traefik Gateway API HTTPRoute BackendRef ExtensionRef Namespace Confusion

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-qq9q-x9w4-chhj. This link is maintained to preserve external references. Original Description Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API...

CVE-2026-65601 Traefik before 3.7.7 Namespace Confusion via HTTPRoute ExtensionRef

Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules.backendRefs.filters.extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route auth...

CVE-2026-65601 Traefik before 3.7.7 Namespace Confusion via HTTPRoute ExtensionRef

Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules.backendRefs.filters.extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route auth...

CVE-2026-65601

Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules.backendRefs.filters.extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route auth...

PT-2026-68942

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-qq9q-x9w4-chhj. This link is maintained to preserve external references. Original Description Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API...

CVE-2026-65601: Incorrect Authorization

Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules.backendRefs.filters.extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route auth...

GHSA-FCRP-7GC2-93G7 Envoy Gateway custom backendRef cross-namespace ReferenceGrant bypass

Impact Envoy Gateway accepts extension-managed custom backendRefs from an HTTPRoute to a backend resource in another namespace without requiring a matching Gateway API ReferenceGrant in the target namespace. This breaks the Gateway API cross-namespace consent model: the namespace that owns the...

Improper Isolation or Compartmentalization

Overview Affected versions of this package are vulnerable to Improper Isolation or Compartmentalization via incorrect ordering in the listener-rule generation process. An attacker can intercept, spoof, or deny traffic intended for another namespace by crafting a malicious HTTPRoute resource on a...

Improper Isolation or Compartmentalization

Overview Affected versions of this package are vulnerable to Improper Isolation or Compartmentalization via incorrect ordering in the listener-rule generation process. An attacker can intercept, spoof, or deny traffic intended for another namespace by crafting a malicious HTTPRoute resource on a...

EUVD-2026-44491

Incorrect behavior order in the Gateway API listener-rule generation in Amazon AWS Load Balancer Controller before 3.4.2 might allow an authenticated remote user to intercept, spoof, or deny another namespace's gRPC traffic on a shared Gateway via a crafted HTTPRoute resource. To mitigate this...

CVE-2026-15738 Cross-namespace traffic interception via incorrect route precedence ordering in AWS Load Balancer Controller

Incorrect behavior order in the Gateway API listener-rule generation in Amazon AWS Load Balancer Controller before 3.4.2 might allow an authenticated remote user to intercept, spoof, or deny another namespace's gRPC traffic on a shared Gateway via a crafted HTTPRoute resource. To mitigate this...

CVE-2026-15738: Improper Isolation or Compartmentalization

Incorrect behavior order in the Gateway API listener-rule generation in Amazon AWS Load Balancer Controller before 3.4.2 might allow an authenticated remote user to intercept, spoof, or deny another namespace's gRPC traffic on a shared Gateway via a crafted HTTPRoute resource. To mitigate this...

CVE-2026-54765: Improper Access Control

Traefik is an open source HTTP reverse proxy and load balancer. From v3.7.0 prior to v3.7.6, Traefik's Kubernetes Gateway API provider may resolve two accepted HTTPRoutes that target the same backend Service:port but configure different backendRef filters to the same child service and apply only...

GO-2026-5083 Traefik: Kubernetes Gateway crossProviderNamespaces bypass allows HTTPRoute outside the allowlist to expose internal Traefik services in github.com/traefik/traefik

Traefik: Kubernetes Gateway crossProviderNamespaces bypass allows HTTPRoute outside the allowlist to expose internal Traefik services in github.com/traefik/traefik...

CVE-2026-54761 Traefik: Kubernetes Gateway crossProviderNamespaces bypass allows HTTPRoute outside the allowlist to expose internal Traefik services

Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.21 and 3.7.5, there is a high severity vulnerability in Traefik's Kubernetes Gateway provider affecting the crossProviderNamespaces allowlist. For HTTPRoute rules that declare multiple WRR backendRefs, Traefik evaluates the allowlis...