GHSA-Q6H5-Q3Q6-F87X CiliumLocalRedirectPolicy addressMatcher allows cross-namespace service traffic hijacking and can break service translation

Impact Users with the ability to create CiliumLocalRedirectPolicies can specify arbitrary ClusterIPs via addressMatcher, which enables hijacking traffic to Services in any namespace, bypassing the namespace-scoping guarantees enforced by serviceMatcher. In addition, deleting such a policy can...

PT-2026-56056

Name of the Vulnerable Software and Affected Versions Cilium versions 1.19.0 through 1.19.3 Cilium versions 1.18.2 through 1.18.9 Cilium versions prior to 1.17.16 Description Users capable of creating CiliumLocalRedirectPolicies can specify arbitrary ClusterIPs using the addressMatcher parameter...