CVE-2025-30163: Cilium node based network policies may incorrectly allow workload traffic

March 24, 2025 (updated July 2, 2026)

Node based network policies (fromNodes and toNodes) will incorrectly permit traffic to/from non-node endpoints that share the labels specified in fromNodes and toNodes sections of network policies. Node based network policy is disabled by default in Cilium.

References

docs.cilium.io/en/stable/security/policy/language/
github.com/advisories/GHSA-c6pf-2v8j-96mc
github.com/cilium/cilium/pull/36657
github.com/cilium/cilium/security/advisories/GHSA-c6pf-2v8j-96mc
nvd.nist.gov/vuln/detail/CVE-2025-30163

Code Behaviors & Features

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