CVEvulnerability

CVE-2026-56743

5.4 MEDIUM Published 2026-07-15 Modified 2026-07-17 Official page ↗
Status
Analyzed
Published
2026-07-15
Last modified
2026-07-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weaknesses
CWE-863

Description

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.

Affected configurations

• cilium cilium (>= 1.19.0 < 1.19.5)

Related

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

References