CVE-2026-56742

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CVSS 3.1

8.9 high

EPSS

<1%p20

Published

Jul 15, 2026 (Jul 15, 2026)

Modified

Jul 17, 2026

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.

Vendors: cilium
Products: cilium
Weakness: CWE-862
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

NVD CVE.org GitHub PoCs EPSS (0.3%)

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