CVE-2025-30163

low-risk

Published 2025-03-24

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. 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. This issue affects: Cilium v1.16 between v1.16.0 and v1.16.7 inclusive and v1.17 between v1.17.0 and v1.17.1 inclusive. This issue is fixed in Cilium v1.16.8 and v1.17.2. Users can work around this issue by ensuring that the labels used in `fromNodes` and `toNodes` fields are used exclusively by nodes and not by other endpoints.

Do I need to act?

0.05% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 3.4/10 Low

ADJACENT_NETWORK / HIGH complexity

Affected Products (1)

Cilium

Affected Vendors

Cilium

References (3)

Product https://docs.cilium.io/en/stable/security/policy/language/#node-based

Patch https://github.com/cilium/cilium/pull/36657

Mitigation https://github.com/cilium/cilium/security/advisories/GHSA-c6pf-2v8j-96mc

/ 100

low-risk

Severity 9/34 · Low

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal