{"id":"CVE-2026-85594","revision":"aaf8fca79e8a4e62bdbaba72cf57a4be","records":[{"revision":"aaf8fca79e8a4e62bdbaba72cf57a4be","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-85594","aliases":[],"title":"Traefik v3.7.1 crossProviderNamespaces Bypass via Service Middleware","description":"Traefik versions from v3.7.1 fail to enforce crossProviderNamespaces restrictions on the traefik.ingress.kubernetes.io/service.middlewares Service annotation in the Kubernetes Ingress provider. A namespace-limited tenant excluded from the allowlist can attach an operator-owned middleware to its Service, and if that middleware injects backend credentials, recover them at a controlled backend.","state":0,"publishedAt":"2026-09-04T11:29:58.771+00:00","modifiedAt":"2026-10-08T15:51:47.581+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\": \"3.7.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"3.7.12\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","score":7,"severity":"HIGH"}],"references":["https://github.com/traefik/traefik/security/advisories/GHSA-m6wx-622r-48r9","https://www.vulncheck.com/advisories/traefik-3.7.1-crossprovidernamespaces-bypass-via-service-middleware"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-85594","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-85594","identifiers":["CVE-2026-85594"]},"retained":false,"historicalAffected":[]}],"coverage":[]}