{"id":"GHSA-7qf5-7ppr-87v8","revision":"778bc1ee315a4706bff48b89b37b1074","records":[{"revision":"778bc1ee315a4706bff48b89b37b1074","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-7qf5-7ppr-87v8","aliases":[],"title":"Duplicate Advisory: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of\u00A0GHSA-8rxv-jg7p-wvg3. This link is maintained to preserve external references.\n\n## Original Description\n\nTraefik 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":2,"publishedAt":"2026-08-01T15:30:27+00:00","modifiedAt":"2026-08-06T17:00:56.6532345+00:00","affected":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"3.7.0"},{"kind":"last_affected","version":"3.7.7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3","https://nvd.nist.gov/vuln/detail/CVE-2026-67309","https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038","https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195","https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass"],"sourceUrl":"https://github.com/advisories/GHSA-7qf5-7ppr-87v8","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-7qf5-7ppr-87v8","identifiers":["GHSA-7qf5-7ppr-87v8"]},"retained":false,"historicalAffected":[]}],"coverage":[]}