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 was fixed by https://github.com/cilium/cilium/pull/36657.
This issue affects:
This issue is fixed in:
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.
The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @oblazek for reporting and fixing this issue.
If you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at [email protected]. This is a private mailing list for the Cilium security team, and your report will be treated as top priority. Please also address any comments or questions on this advisory to the same mailing list.
| Score | Percentile |
|---|---|
| 0.20% | 9.60% |
| Base score | Version | Severity | Vector |
|---|---|---|---|
| 3.4 | 3.1 | — |
|
| Type | Value |
|---|---|
| GHSA | GHSA-c6pf-2v8j-96mc ↗ |
| CVE | CVE-2025-30163 ↗ |
| CWE id | Name |
|---|---|
| CWE-863 | Incorrect Authorization |
Vulnerable version ranges and first patched releases as published by GitHub.
| Ecosystem | Package | Vulnerable range | First patched | Vulnerable functions |
|---|---|---|---|---|
| go | github.com/cilium/cilium | >= 1.16.0, < 1.16.8 | 1.16.8 | — |
| go | github.com/cilium/cilium | >= 1.17.0, < 1.17.2 | 1.17.2 | — |