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Incorrect Authorization Affecting cilium-1.19 package, versions <1.19.7-r7

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.25% (16th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-CILIUM119-19827139
  • published15 Sept 2026
  • disclosed15 Jul 2026
Report a new vulnerability Found a mistake?

Introduced: 15 Jul 2026

CVE-2026-56743  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Chainguard cilium-1.19 to version 1.19.7-r7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cilium-1.19 package and not the cilium-1.19 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Cilium is a networking, observability, and security solution. From 1.19.0 to 1.19.4, standard Kubernetes NetworkPolicy specifications using CIDR-based ipBlock rules without pod or namespace selectors erroneously generate a wildcard namespace allow rule when Cilium is configured with a custom clusterName rather than the default any value. The parser incorrectly instantiates a pod selector on selectorless peer definitions, allowing traffic from other workloads in the same namespace as the subject of the policy. This issue is fixed in version 1.19.5.