{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.11.54"
              },
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.6.25"
              },
              {
                "introduced": "3.7.0"
              },
              {
                "fixed": "3.7.10"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "d99d2f95e66a28ee8180634dc80fdf13ba68c62a"
            },
            {
              "introduced": "04aa6bb4f9776f2ba87e5cd181d250e3610e6419"
            },
            {
              "fixed": "1e8e8c200cce5fbd1fff8579e5e9dc0311a8a54a"
            },
            {
              "fixed": "4b18b24b0b002dcc80e0640c6088a87d813de29a"
            },
            {
              "fixed": "2a2349356c01b1b1f7ecddb0c17b30c97f5241e7"
            },
            {
              "fixed": "65ebf4b47fbdc33e3856803a5844a404e094d52d"
            }
          ],
          "repo": "https://github.com/traefik/traefik",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-62fc-8686-hfmq"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-653",
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71325.json"
  },
  "details": "Traefik is an open-source edge router that makes publishing services a fun and easy experience. Prior to 2.11.54, 3.6.25, and 3.7.10, cross-namespace @kubernetescrd references are not rejected for TraefikService backend references resolved by the service resolver. A tenant confined by RBAC to a single namespace can therefore bind its own router to a TraefikService owned by another namespace and expose or reroute that namespace's backend, defeating the namespace isolation allowCrossNamespace=false is meant to enforce. This issue is fixed in version 2.11.54, 3.6.25, 3.7.10.",
  "id": "CVE-2026-71325",
  "modified": "2026-08-09T03:30:50.274487733Z",
  "published": "2026-08-06T16:24:56.606Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/traefik/traefik/releases/tag/v2.11.54"
    },
    {
      "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-2026-71325.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71325"
    },
    {
      "type": "FIX",
      "url": "https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d52d"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef"
}