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.
Metrics
Affected Vendors & Products
References
History
Thu, 16 Jul 2026 13:30:00 +0000
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ssvc
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Wed, 15 Jul 2026 22:15:00 +0000
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Cilium
Cilium cilium |
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| Vendors & Products |
Cilium
Cilium cilium |
Wed, 15 Jul 2026 19:45:00 +0000
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| 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. | |
| Title | Cilium may unexpectedly allow ingress traffic from the local namespace when a Kubernetes NetworkPolicy is configured with an ipBlock match | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-16T13:03:36.080Z
Reserved: 2026-06-22T19:17:28.959Z
Link: CVE-2026-56743
Updated: 2026-07-16T13:02:51.916Z
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OpenCVE Enrichment
Updated: 2026-07-15T22:00:06Z