{"schemaVersion":3,"id":"GHSA-7QF5-7PPR-87V8","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Duplicate Advisory: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass\n\n## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-8rxv-jg7p-wvg3.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.","dates":{"published":"2026-08-01T15:30:27.000Z","modified":"2026-08-06T17:00:56.653Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.8,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"OSV · Go","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","computed":true,"selection":"version-preference"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"OSV · Go","score":7.8,"severity":"high","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","exploitability":null,"impact":null,"computed":true}]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"github.com/traefik/traefik","product":"v3","name":"github.com/traefik/traefik/v3","label":"v3","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/traefik/traefik/v3","purlType":"golang","versions":[{"text":"≥ 3.7.0, ≤ 3.7.7","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 3.7.0, ≤ 3.7.7","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3","label":"github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3","hostname":"github.com","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67309","label":"nvd.nist.gov/vuln/detail/CVE-2026-67309","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038","label":"github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195","label":"github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195","hostname":"github.com","tags":["WEB"]},{"url":"https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass","label":"www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass","hostname":"www.vulncheck.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-08-01T15:30:27.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-06T17:00:56.653Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T18:50:56.147Z","stale":false,"partial":false}}