{"action":"Upgrade github.com/cilium/cilium to 1.18.6 or later.","affected":[{"fixed":"1.18.6","introduced":"1.18.0"}],"component":"github.com/cilium/cilium","cve_ids":["CVE-2026-26963"],"ecosystem":"Go","epss":0.0014,"exploited":false,"fixed_versions":["1.18.6"],"ghsa_id":"GHSA-5r23-prx4-mqg3","id":"tcs_01M5KGE8JYT6YB3WA2SAA16RXQ","modified_at":"2026-02-23T19:40:58.531438Z","published_at":"2026-02-23T18:23:12Z","references":["https://osv.dev/vulnerability/GO-2026-4522","https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3","https://nvd.nist.gov/vuln/detail/CVE-2026-26963","https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885","https://github.com/cilium/cilium/pull/42892","https://github.com/cilium/cilium/releases/tag/v1.18.6"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"GO-2026-4522","url":"https://osv.dev/vulnerability/GO-2026-4522"},{"source":"nvd","source_id":"CVE-2026-26963","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26963"}],"summary":"Cilium may not enforce host firewall policies when Native Routing, WireGuard and Node Encryption are enabled in github.com/cilium/cilium"}