CVE-2026-56742

MEDIUM

5.9

CVSS Severity Score

EPSS Score0.0000%

EPSS Percentile0.00th

Published2026-07-15

Last Modified2026-07-17

Data SourcesNVD

Vulnerability 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.

Affected Platforms (CPE)

No CPE configurations currently published for this record.

References & Advisories

🔗 https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb

🔗 https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857

🔗 https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b

🔗 https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca

🔗 https://github.com/cilium/cilium/releases/tag/v1.17.17

🔗 https://github.com/cilium/cilium/releases/tag/v1.18.11

🔗 https://github.com/cilium/cilium/releases/tag/v1.19.5

🔗 https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj

Vulnerability Description

Affected Platforms (CPE)

References & Advisories

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