{"cve":"CVE-2026-26963","nvd":{"published":"2026-02-20T00:16:16.167","modified":"2026-06-17T10:26:27.533","status":"Analyzed","description":"Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.18.0 through 1.18.5 will incorrectly permit traffic from Pods on other nodes when Native Routing, WireGuard and Node Encryption are enabled. This issue has been fixed in version 1.18.6.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-863"],"references":["https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885","https://github.com/cilium/cilium/pull/42892","https://github.com/cilium/cilium/releases/tag/v1.18.6","https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3"],"products":["cilium:cilium"],"source":"nvd","synced_at":"2026-10-19T22:23:35.260773158+00:00"},"epss":{"cve":"CVE-2026-26963","score":0.0014,"percentile":0.0337,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-5r23-prx4-mqg3","url":"https://osv.dev/vulnerability/GHSA-5r23-prx4-mqg3","summary":"Cilium may not enforce host firewall policies when Native Routing, WireGuard and Node Encryption are enabled","modified":"2026-02-23T19:40:58.531438Z","packages":[{"ecosystem":"Go","name":"github.com/cilium/cilium","purl":"pkg:golang/github.com/cilium/cilium","ranges":[">=1.18.0 <1.18.6"],"fixed":["1.18.6"]}]},{"id":"GO-2026-4522","url":"https://osv.dev/vulnerability/GO-2026-4522","summary":"Cilium may not enforce host firewall policies when Native Routing, WireGuard and Node Encryption are enabled in github.com/cilium/cilium","modified":"2026-02-23T19:40:58.531438Z","packages":[{"ecosystem":"Go","name":"github.com/cilium/cilium","purl":"pkg:golang/github.com/cilium/cilium","ranges":[">=1.18.0 <1.18.6"],"fixed":["1.18.6"]}]}],"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."]}