{"id":"CVE-2026-67309","revision":"434acbfa3c3e43fd9a5b21c8c0dd77d7","records":[{"revision":"434acbfa3c3e43fd9a5b21c8c0dd77d7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-67309","aliases":[],"title":"Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass","description":"Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text without requiring a path separator (e.g., path /api(.*) with rewrite target /$1), a crafted request such as /api../admin matches the public router, is rewritten to a dot-segment traversal path (/../admin), and is forwarded without post-replacement normalization validation. A backend that normalizes dot segments resolves the path to a protected endpoint (e.g., /admin) reachable only through a separate router secured with BasicAuth, DigestAuth, or ForwardAuth, resulting in route-level authentication bypass. The issue is fixed in v3.7.8.","state":0,"publishedAt":"2026-08-01T12:22:18.191+00:00","modifiedAt":"2026-10-08T15:24:04.107+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                            \"lessThan\": \"3.7.8\"\n                        },\n                        {\n                            \"version\": \"3.7.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","score":7.8,"severity":"HIGH"}],"references":["https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3","https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195","https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038","https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-67309","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-67309","identifiers":["CVE-2026-67309"]},"retained":false,"historicalAffected":[]}],"coverage":[]}