Detections
Analytics
CVE-2026-56742
medium
Description
Cilium is a networking, observability, and security solution. Prior to 1.17.17, 1.18.11, and 1.19.5, Cilium clusters using Gateway API allow users with permissions to create or update namespaced HTTPRoutes to mirror HTTP traffic to any Service in any namespace, bypassing the ReferenceGrant authorization mechanism. Gateway API functionality is disabled by default. This issue is fixed in versions 1.17.17, 1.18.11, and 1.19.5.
References
https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj
https://github.com/cilium/cilium/releases/tag/v1.19.5
https://github.com/cilium/cilium/releases/tag/v1.18.11
https://github.com/cilium/cilium/releases/tag/v1.17.17
https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca
https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b
https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857
https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb