CVE-2025-30163: Github.com/cilium/cilium Cilium Node Based Network Policies Vulnerability
LOWCVE-2025-30163 is a LOW (CVSS 3.4) cilium node based network policies vulnerability (CWE-863: Incorrect Authorization) affecting Github.com/cilium/cilium libraries in the Go ecosystem. The issue involves cilium node based network policies may incorrectly allow workload traffic. Remediation is available by upgrading affected packages to version 1.16.8, 1.17.2.
CVE-2025-30163 at a Glance
Security Impact
CVSS: 3.4
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N).
How to Fix CVE-2025-30163
To remediate this vulnerability, upgrade all affected Github.com/cilium/cilium dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/cilium/cilium to 1.16.8Upgrade github.com/cilium/cilium to 1.17.2Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/cilium/ciliumHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-30163, inspect your project dependencies for Github.com/cilium/cilium:
inspect dependencies for github.com/cilium/ciliumAnalyze the terminal output to locate any version of Github.com/cilium/cilium in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.16.8), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Github.com/cilium/cilium, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-30163 Affected Github.com/cilium/cilium Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/cilium/cilium
|
Go |
≥ 1.16.0
< 1.16.8
|
1.16.8
|
|
github.com/cilium/cilium
|
Go |
≥ 1.17.0
< 1.17.2
|
1.17.2
|
References
Frequently Asked Questions
What is CVE-2025-30163?
Which Github.com/cilium/cilium versions are affected?
What version fixes CVE-2025-30163?
Is github.com/cilium/cilium affected?
What is the CVSS score of CVE-2025-30163?
What CWE is associated with CVE-2025-30163?
How can I check Go dependencies for CVE-2025-30163?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-c6pf-2v8j-96mc",
"modified" : "2026-07-02T20:20:36Z",
"published" : "2025-03-24T19:36:21Z",
"aliases" : [ "CVE-2025-30163" ],
"summary" : "Cilium node based network policies may incorrectly allow workload traffic",
"details" : "### Impact\n\n[Node based network policies](https://docs.cilium.io/en/stable/security/policy/language/#node-based) (`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.\n\n### Patches\n\nThis issue was fixed by https://github.com/cilium/cilium/pull/36657.\n\nThis issue affects:\n\n- Cilium v1.16 between v1.16.0 and v1.16.7 inclusive\n- Cilium v1.17 between v1.17.0 and v1.17.1 inclusive\n\nThis issue is fixed in:\n\n- Cilium v1.16.8\n- Cilium v1.17.2\n\n### Workarounds\n\nUsers 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.\n\n### Acknowledgements\n\nThe Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @oblazek for reporting and fixing this issue.\n\n### For more information\n\nIf you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at [security@cilium.io](mailto:security@cilium.io). 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.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/cilium/cilium"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.16.0"
}, {
"fixed" : "1.16.8"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/cilium/cilium"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.17.0"
}, {
"fixed" : "1.17.2"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/cilium/cilium/security/advisories/GHSA-c6pf-2v8j-96mc"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-30163"
}, {
"type" : "WEB",
"url" : "https://github.com/cilium/cilium/pull/36657"
}, {
"type" : "WEB",
"url" : "https://docs.cilium.io/en/stable/security/policy/language/#node-based"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/cilium/cilium"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-863" ],
"severity" : "LOW",
"github_reviewed" : true,
"github_reviewed_at" : "2025-03-24T19:36:21Z",
"nvd_published_at" : "2025-03-24T19:15:52Z"
}
}