{"id":"EUVD-2026-51815","enisaUuid":"7805befb-4d7e-3749-84dd-1a9137a9f786","description":"Traefik versions \u003e\u003d v3.7.0 and \u003c\u003d v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider\u0027s 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.","datePublished":"Aug 1, 2026, 12:22:18 PM","dateUpdated":"Oct 8, 2026, 3:24:04 PM","baseScore":7.8,"baseScoreVersion":"4.0","baseScoreVector":"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","references":"https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3\nhttps://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195\nhttps://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038\nhttps://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass\n","aliases":"CVE-2026-67309\nGHSA-7qf5-7ppr-87v8\nGHSA-8rxv-jg7p-wvg3\n","assigner":"VulnCheck","epss":0.66,"enisaIdProduct":[{"id":"ef075f71-3b4c-3f47-9608-ecdda3c900e2","product":{"name":"traefik","vendor":{"name":"traefik"}},"product_version":"3.7.0 \u003c3.7.8"}],"enisaIdVendor":[{"id":"849c290e-32c2-3488-8f7c-624dca5b6fb5","vendor":{"name":"traefik"}}],"enisaIdVulnerability":[{"id":"2590af18-da3c-3c83-9866-f0b814b0dc1f","vulnerability":{"id":"GHSA-8rxv-jg7p-wvg3","description":"Traefik: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass","datePublished":"Aug 6, 2026, 4:45:28 PM","dateUpdated":"Aug 6, 2026, 4:45:53 PM","baseScore":0.0,"references":"https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-67309\nhttps://github.com/traefik/traefik/commit/759515bec1b9f628b21ea8968ef63da853be5e29\nhttps://github.com/traefik/traefik\nhttps://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass\n","enisa_id":"EUVD-2026-51815\n","aliases":"CVE-2026-67309\nGHSA-8rxv-jg7p-wvg3\n","epss":0.0,"dataProcessed":"Oct 25, 2026, 1:59:06 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"2b1c568f-7a44-33aa-8703-1aefe7d7a183","vulnerability":{"id":"GHSA-7qf5-7ppr-87v8","description":"Duplicate Advisory: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass","datePublished":"Aug 1, 2026, 3:30:27 PM","dateUpdated":"Aug 6, 2026, 4:45:13 PM","baseScore":0.0,"references":"https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-67309\nhttps://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038\nhttps://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195\nhttps://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass\n","enisa_id":"EUVD-2026-51815\n","aliases":"GHSA-7qf5-7ppr-87v8\n","epss":0.0,"dataProcessed":"Oct 25, 2026, 1:58:26 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"c52279ef-b46b-3f8d-883b-d9168d7ca041","vulnerability":{"id":"CVE-2026-67309","description":"Traefik versions \u003e\u003d v3.7.0 and \u003c\u003d v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider\u0027s 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.","datePublished":"Aug 1, 2026, 12:22:18 PM","dateUpdated":"Oct 8, 2026, 3:24:04 PM","status":"PUBLISHED","baseScore":7.8,"baseScoreVersion":"4.0","baseScoreVector":"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","references":"https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3\nhttps://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195\nhttps://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038\nhttps://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass\n","enisa_id":"EUVD-2026-51815\n","assigner":"VulnCheck","epss":0.66,"dataProcessed":"Oct 28, 2026, 7:15:27 AM","vulnerabilityProduct":[{"id":"e8093fac-3f79-3005-aeae-ac3382cfff54","product":{"name":"traefik","vendor":{"name":"traefik"}},"product_version":"3.7.0 \u003c3.7.8"}],"vulnerabilityVendor":[{"id":"1b52e26a-9219-3e3c-a02e-0623cd834629","vendor":{"name":"traefik"}}]}}],"enisaIdAdvisory":[]}