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CVE-2026-56742

MEDIUM
5.9
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-56742
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-22 19:17 UTC
Published
2026-07-15 19:14 UTC
Last updated
2026-07-15 19:14 UTC
Primary CWE
CWE-862
CWE-862: Missing Authorization
Vendor / Product
cilium / cilium
Sources
cve.org  ·  NVD

Severity & Metrics

5.9 MEDIUM CVSS 3.1
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
Affected products (1)
VendorProductPlatformVersions
cilium cilium — < 1.17.17, >= 1.18.0, < 1.18.11, >= 1.19.0, < 1.19.5
Weakness (CWE)
CWESourceDescription
CWE-862 cna CWE-862: Missing Authorization
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.9 MEDIUM 3.1 cna CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
References (8)
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