{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "3.7.0"
              },
              {
                "fixed": "3.7.8"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "04aa6bb4f9776f2ba87e5cd181d250e3610e6419"
            },
            {
              "fixed": "4a87f05acfa2beb0211cee6e2ad4d002289752b5"
            }
          ],
          "repo": "https://github.com/traefik/traefik",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8rxv-jg7p-wvg3"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67309.json"
  },
  "details": "Traefik versions \u003e= v3.7.0 and \u003c= 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.",
  "id": "CVE-2026-67309",
  "modified": "2026-08-04T11:31:16.727917030Z",
  "published": "2026-08-01T12:22:18.191Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67309.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67309"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass"
    },
    {
      "type": "FIX",
      "url": "https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038"
    },
    {
      "type": "FIX",
      "url": "https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass"
}