Security Advisory

CVE-2026-56742

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-15 19:14:07

Last updated 2026-07-16 12:57:08

Assigner GitHub_M

CVSS score 5.9

State PUBLISHED

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.

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