{"id":"CVE-2026-85596","revision":"8c8d6e5fe30c4eadb5ba469f45014f74","records":[{"revision":"8c8d6e5fe30c4eadb5ba469f45014f74","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-85596","aliases":[],"title":"Traefik v3.7 Authentication Bypass via TLS Option Conflict","description":"Traefik versions >= v3.7.0 and <= v3.7.10 contain an authentication bypass in the Kubernetes Ingress NGINX provider. The TLS option generated for an Ingress carrying the nginx.ingress.kubernetes.io/auth-tls-secret annotation was named after the Ingress namespace and name. As a result, two Ingress objects sharing the same host, the same client CA secret, and the same client-authentication mode produced two distinct TLS option names for that host. Traefik treats this as a TLS options conflict and falls back to the entry point's default TLS configuration, which does not request a client certificate, so a route configured with nginx.ingress.kubernetes.io/auth-tls-verify-client: \"on\" becomes reachable without a client certificate. Only the v3.7 line is affected; the issue is fixed in v3.7.11.","state":0,"publishedAt":"2026-09-04T11:30:00.112+00:00","modifiedAt":"2026-10-08T15:51:48.871+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\": \"3.7.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"3.7.10\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.2,"severity":"HIGH"}],"references":["https://github.com/traefik/traefik/security/advisories/GHSA-j994-9gqj-9hwq","https://www.vulncheck.com/advisories/traefik-3.7-authentication-bypass-via-tls-option-conflict"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-85596","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-85596","identifiers":["CVE-2026-85596"]},"retained":false,"historicalAffected":[]}],"coverage":[]}