{"cve":"CVE-2025-64715","nvd":{"published":"2025-11-29T01:16:01.427","modified":"2026-10-19T13:10:00.110","status":"Analyzed","description":"Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.16.17, 1.17.10, and 1.18.4, 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. This issue has been patched in versions 1.16.17, 1.17.10, and 1.18.4. There are no workarounds for this issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":5.5},"cwes":["CWE-284"],"references":["https://github.com/cilium/cilium/commit/a385856b59c8289cc7273fa3a3062bbf0ef96c97","https://github.com/cilium/cilium/releases/tag/v1.16.17","https://github.com/cilium/cilium/releases/tag/v1.17.10","https://github.com/cilium/cilium/releases/tag/v1.18.4","https://github.com/cilium/cilium/security/advisories/GHSA-38pp-6gcp-rqvm"],"products":["cilium:cilium"],"source":"nvd","synced_at":"2026-10-19T22:16:02.354564667+00:00"},"epss":{"cve":"CVE-2025-64715","score":0.00172,"percentile":0.06505,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-38pp-6gcp-rqvm","url":"https://osv.dev/vulnerability/GHSA-38pp-6gcp-rqvm","summary":"Cilium with misconfigured toGroups in policies can lead to unrestricted egress traffic","modified":"2026-09-10T03:50:31.232180516Z","packages":[{"ecosystem":"Go","name":"github.com/cilium/cilium","purl":"pkg:golang/github.com/cilium/cilium","ranges":[">=1.18.0 <1.18.4"],"fixed":["1.18.4"]},{"ecosystem":"Go","name":"github.com/cilium/cilium","purl":"pkg:golang/github.com/cilium/cilium","ranges":[">=1.17.0 <1.17.10"],"fixed":["1.17.10"]},{"ecosystem":"Go","name":"github.com/cilium/cilium","purl":"pkg:golang/github.com/cilium/cilium","ranges":["<1.16.17"],"fixed":["1.16.17"]}]},{"id":"GO-2025-4167","url":"https://osv.dev/vulnerability/GO-2025-4167","summary":"Cilium with misconfigured toGroups in policies can lead to unrestricted egress traffic in Ciliumgithub.com/cilium/cilium","modified":"2026-02-04T03:22:00.049612Z","packages":[{"ecosystem":"Go","name":"github.com/cilium/cilium","purl":"pkg:golang/github.com/cilium/cilium","ranges":["<1.16.17",">=1.17.0 <1.17.10",">=1.18.0 <1.18.4"],"fixed":["1.16.17","1.17.10","1.18.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}