PT-2026-60281 · Cilium · Cilium

Published 2026-07-15 · Updated 2026-07-15 · CVE-2026-56742

NVD

CVSS v3.1

5.9

Medium

Base vector

AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L

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.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-56742

Affected Products

Cilium

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-56742 · Security Note
• https://github.com/cilium/cilium/releases/tag/v1.17.17 · Note
• https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857 · Note
• https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb · Note
• https://github.com/cilium/cilium/releases/tag/v1.19.5 · Note
• https://github.com/cilium/cilium/releases/tag/v1.18.11 · Note
• https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b · Note
• https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj · Note
• https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca · Note