{"id":"CVE-2026-71327","aliases":["GHSA-fgjj-px3w-67xx","GO-2026-6209"],"url":"https://o3.security/vulnerability/CVE-2026-71327","summary":"Traefik: Gateway API route identity collision allows cross-namespace backend hijacking","details":"Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and service identities by hyphen-concatenating namespace, route name, Gateway identity, entry point, and rule index, allowing colliding Routes to overwrite another namespace's backend. This issue is fixed in 3.6.25 and 3.7.10.","published":"2026-08-06T16:38:11.600Z","modified":"2026-09-18T03:48:29.422754009Z","cvss":null,"epss":{"score":0.00352,"percentile":0.28712,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","fixedVersion":"3.6.25"},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","fixedVersion":"3.7.10"}],"fix":{"url":"https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9","label":"traefik/traefik@a764166"},"references":[{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.6.25"},{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.7.10"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71327.json"},{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71327"},{"type":"FIX","url":"https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9"},{"type":"FIX","url":"https://github.com/traefik/traefik/pull/13580"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-18T03:48:29.422754009Z"}}