High 8.9Published Jul 15, 2026

CVE-2026-56742Cilium is a networking, observability, and security solution.

Updated under an hour ago (2026-10-19 06:30 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for cilium

Exploited in the last 30 days

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.

CVSS: 8.9 HIGH (v3.1, NVD)CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

cilium cilium cilium:cilium	before 1.17.17; from 1.18.0 before 1.18.11; from 1.19.0 before 1.19.5	NVD

References

https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333debpatch
https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857patch
https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032bpatch
https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512capatch
https://github.com/cilium/cilium/releases/tag/v1.17.17release-notes
https://github.com/cilium/cilium/releases/tag/v1.18.11release-notes
https://github.com/cilium/cilium/releases/tag/v1.19.5release-notes
https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmjvendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.