{"id":"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.","aliases":["GHSA-fgjj-px3w-67xx"],"modified":"2026-08-08T03:32:25.351743168Z","published":"2026-08-06T16:38:11.600Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-694"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71327.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/traefik/traefik","events":[{"introduced":"d99d2f95e66a28ee8180634dc80fdf13ba68c62a"},{"introduced":"04aa6bb4f9776f2ba87e5cd181d250e3610e6419"},{"fixed":"4b18b24b0b002dcc80e0640c6088a87d813de29a"},{"fixed":"2a2349356c01b1b1f7ecddb0c17b30c97f5241e7"},{"fixed":"a764166656f0cd337f917ac76315c381cca844f9"}],"database_specific":{"extracted_events":[{"introduced":"3.0.0"},{"fixed":"3.6.25"},{"introduced":"3.7.0"},{"fixed":"3.7.10"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v3.7.9","v3.7.8","v3.7.7","v3.7.6","v3.7.5","v3.7.4","v3.7.3","v3.7.2","v3.7.1","v3.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71327.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}