GHSA-38pp-6gcp-rqvm

Source

https://github.com/advisories/GHSA-38pp-6gcp-rqvm

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/12/GHSA-38pp-6gcp-rqvm/GHSA-38pp-6gcp-rqvm.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-38pp-6gcp-rqvm

Aliases

CVE-2025-64715

Published

2025-12-01T18:59:54Z

Modified

2025-12-02T14:36:36.233224Z

Severity

4.0 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator

Summary

Cilium with misconfigured toGroups in policies can lead to unrestricted egress traffic

Details

Impact

CiliumNetworkPolicys which use egress.toGroups.aws.securityGroupsIds to reference AWS security group IDs that do not exist or are not attached to any network interface may unintentionally allow broader outbound access than intended by the policy authors. In such cases, the toCIDRset section of the derived policy is not generated, which means outbound traffic may be permitted to more destinations than originally intended.

Patches

This issue has been patched in:

Cilium v1.18.4
Cilium v1.17.10
Cilium v1.16.17

This issue affects:

Cilium v1.18 between v1.18.0 and v1.18.3 inclusive
Cilium v1.17 between v1.17.0 and v1.17.9 inclusive
Cilium v1.16.16 and below

Workarounds

There is no workaround to this issue.

Acknowledgements

The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @SeanEmac for reporting this issue and to @fristonio for the patch.

For more information

If 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. This is a private mailing list for the Cilium security team, and your report will be treated as top priority.

Database specific

{
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-01T18:59:54Z",
    "nvd_published_at": "2025-11-29T01:16:01Z",
    "cwe_ids": [
        "CWE-284"
    ]
}

References

Affected packages

Go / github.com/cilium/cilium

Package

Name: github.com/cilium/cilium; View open source insights on deps.dev
Purl: pkg:golang/github.com/cilium/cilium

Affected ranges

Type: SEMVER
Events: Introduced

1.18.0

Fixed

1.18.4

Go / Ciliumgithub.com/cilium/cilium

Package

Name: Ciliumgithub.com/cilium/cilium; View open source insights on deps.dev
Purl: pkg:golang/Ciliumgithub.com/cilium/cilium

Affected ranges

Type: SEMVER
Events: Introduced

1.17.0

Fixed

1.17.10

Go / github.com/cilium/cilium

Package

Name: github.com/cilium/cilium; View open source insights on deps.dev
Purl: pkg:golang/github.com/cilium/cilium

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.16.17