{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.6.25"
              },
              {
                "introduced": "3.7.0"
              },
              {
                "fixed": "3.7.10"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "d99d2f95e66a28ee8180634dc80fdf13ba68c62a"
            },
            {
              "introduced": "04aa6bb4f9776f2ba87e5cd181d250e3610e6419"
            },
            {
              "fixed": "4b18b24b0b002dcc80e0640c6088a87d813de29a"
            },
            {
              "fixed": "2a2349356c01b1b1f7ecddb0c17b30c97f5241e7"
            },
            {
              "fixed": "a764166656f0cd337f917ac76315c381cca844f9"
            }
          ],
          "repo": "https://github.com/traefik/traefik",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-fgjj-px3w-67xx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-694"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71327.json"
  },
  "details": "Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and service identities by hyphen-concatenating namespace, route name, Gateway identity, entry point, and rule index, allowing colliding Routes to overwrite another namespace's backend. This issue is fixed in 3.6.25 and 3.7.10.",
  "id": "CVE-2026-71327",
  "modified": "2026-08-09T03:30:09.930865611Z",
  "published": "2026-08-06T16:38:11.600Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/traefik/traefik/releases/tag/v3.6.25"
    },
    {
      "type": "WEB",
      "url": "https://github.com/traefik/traefik/releases/tag/v3.7.10"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71327.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71327"
    },
    {
      "type": "FIX",
      "url": "https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/traefik/traefik/pull/13580"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Traefik: Gateway API route identity collision allows cross-namespace backend hijacking"
}