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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-56742

35
FAUCET Score

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.

First published: Jul 15, 2026Last modified: Jul 15, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 1.17.17CPE matchmatch criteria
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*
>= 1.18.0, < 1.18.11CPE matchmatch criteria
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*
>= 1.19.0, < 1.19.5CPE matchmatch criteria
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
1.7
Impact Score
3.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.17%
Probability of exploitation in next 30 days
EPSS Percentile
6.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0017 is in the 2nd percentile among its peer group of 554 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb
Patch
github.com / cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857
Patch
github.com / cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b
Patch
github.com / cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca
Patch
github.com / cilium/cilium/releases/tag/v1.17.17
Release Notes
github.com / cilium/cilium/releases/tag/v1.18.11
Release Notes
github.com / cilium/cilium/releases/tag/v1.19.5
Release Notes
github.com / cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj
Vendor Advisory