{"id":"CVE-2026-65602","revision":"5bc753e7f94b4b0384b87b9c0a8bf42b","records":[{"revision":"5bc753e7f94b4b0384b87b9c0a8bf42b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-65602","aliases":[],"title":"Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass","description":"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.","state":0,"publishedAt":"2026-07-22T11:21:48.127+00:00","modifiedAt":"2026-10-08T15:23:55.582+00:00","affected":[{"ecosystem":"Vendor product","name":"traefik","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"traefik\",\n                    \"product\": \"traefik\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/github.com/traefik/traefik/v3\",\n                    \"versions\": [\n                        {\n                            \"version\": \"3.6.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.6.23\"\n                        },\n                        {\n                            \"version\": \"3.6.23\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"traefik","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"traefik\",\n                    \"product\": \"traefik\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/github.com/traefik/traefik/v3\",\n                    \"versions\": [\n                        {\n                            \"version\": \"3.7.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.7.7\"\n                        },\n                        {\n                            \"version\": \"3.7.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/traefik/traefik/security/advisories/GHSA-42cj-m3vj-89wv","https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0","https://www.vulncheck.com/advisories/traefik-before-ingressroutetcp-serverstransport-namespace-bypass"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-65602","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-65602","identifiers":["CVE-2026-65602"]},"retained":false,"historicalAffected":[]}],"coverage":[]}