{"id":"CVE-2026-71327","state":"PUBLISHED","title":"Traefik: Gateway API route identity collision allows cross-namespace backend hijacking","description":"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.","publishedAt":"2026-08-06T16:38:11.600Z","updatedAt":"2026-08-07T15:41:26.662Z","severity":{"score":7.6,"label":"High","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["traefik traefik"],"affected":[{"vendor":"traefik","product":"traefik","versions":[{"version":">= 3.0.0, < 3.6.25","status":"affected"},{"version":">= 3.7.0, < 3.7.10","status":"affected"}]}],"references":["https://github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx","https://github.com/traefik/traefik/pull/13580","https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9","https://github.com/traefik/traefik/releases/tag/v3.6.25","https://github.com/traefik/traefik/releases/tag/v3.7.10"],"weaknesses":["CWE-694"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/71xxx/CVE-2026-71327.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71327","state":"PUBLISHED","datePublished":"2026-08-06T16:38:11.600Z","dateUpdated":"2026-08-07T15:41:26.662Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-05T18:14:42.065Z"},"containers":{"cna":{"title":"Traefik: Gateway API route identity collision allows cross-namespace backend hijacking","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"traefik","product":"traefik","versions":[{"version":">= 3.0.0, < 3.6.25","status":"affected"},{"version":">= 3.7.0, < 3.7.10","status":"affected"}]}],"references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx","name":"https://github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/traefik/traefik/pull/13580","name":"https://github.com/traefik/traefik/pull/13580","tags":["x_refsource_MISC"]},{"url":"https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9","name":"https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9","tags":["x_refsource_MISC"]},{"url":"https://github.com/traefik/traefik/releases/tag/v3.6.25","name":"https://github.com/traefik/traefik/releases/tag/v3.6.25","tags":["x_refsource_MISC"]},{"url":"https://github.com/traefik/traefik/releases/tag/v3.7.10","name":"https://github.com/traefik/traefik/releases/tag/v3.7.10","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.6,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-694","lang":"en","description":"CWE-694: Use of Multiple Resources with Duplicate Identifier","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-06T16:38:11.600Z"},"source":{"advisory":"GHSA-fgjj-px3w-67xx","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-07T15:40:56.189049Z","id":"CVE-2026-71327","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-07T15:41:26.662Z"}}]}}}