{"id":"CVE-2026-65602","aliases":["GHSA-42cj-m3vj-89wv","GO-2026-6192"],"url":"https://o3.security/vulnerability/CVE-2026-65602","summary":"Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass","details":"Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references (the allowlist was only enforced for HTTP serversTransport references). A low-privileged Kubernetes user in a namespace not listed in crossProviderNamespaces can set serversTransport: foo@file on an IngressRouteTCP service, causing Traefik to accept the forbidden cross-provider reference and use a file-provider TCPServersTransport — including privileged backend mTLS client certificates, SPIFFE identity, or PROXY-protocol settings. This is fixed in 3.6.23 and 3.7.7.","published":"2026-07-22T11:21:48.127Z","modified":"2026-09-09T18:26:43.687906329Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","fixedVersion":"3.6.23"},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","fixedVersion":"3.7.7"}],"fix":{"url":"https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0","label":"traefik/traefik@26c96a3"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65602.json"},{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-42cj-m3vj-89wv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65602"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/traefik-before-ingressroutetcp-serverstransport-namespace-bypass"},{"type":"FIX","url":"https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-09T18:26:43.687906329Z"}}