{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71325","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-05T18:14:42.065Z","datePublished":"2026-08-06T16:24:56.606Z","dateUpdated":"2026-08-07T17:09:50.885Z"},"containers":{"cna":{"title":"Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef","problemTypes":[{"descriptions":[{"cweId":"CWE-653","lang":"en","description":"CWE-653: Improper Isolation or Compartmentalization","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":4.8,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq"},{"name":"https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d52d","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d52d"},{"name":"https://github.com/traefik/traefik/releases/tag/v2.11.54","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v2.11.54"},{"name":"https://github.com/traefik/traefik/releases/tag/v3.6.25","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v3.6.25"},{"name":"https://github.com/traefik/traefik/releases/tag/v3.7.10","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v3.7.10"}],"affected":[{"vendor":"traefik","product":"traefik","versions":[{"version":"< 2.11.54","status":"affected"},{"version":">= 3.0.0, < 3.6.25","status":"affected"},{"version":">= 3.7.0, < 3.7.10","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-06T16:24:56.606Z"},"descriptions":[{"lang":"en","value":"Traefik is an open-source edge router that makes publishing services a fun and easy experience. Prior to 2.11.54, 3.6.25, and 3.7.10, cross-namespace @kubernetescrd references are not rejected for TraefikService backend references resolved by the service resolver. A tenant confined by RBAC to a single namespace can therefore bind its own router to a TraefikService owned by another namespace and expose or reroute that namespace's backend, defeating the namespace isolation allowCrossNamespace=false is meant to enforce. This issue is fixed in version 2.11.54, 3.6.25, 3.7.10."}],"source":{"advisory":"GHSA-62fc-8686-hfmq","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-07T15:34:06.328209Z","id":"CVE-2026-71325","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-07T17:09:50.885Z"}}]}}