{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.0.14"
              },
              {
                "fixed": "2.1.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "8b5e382fe217107c7b777ea9c6b4bc3d2e156202"
            },
            {
              "fixed": "1d70d2992ec7ee5fac2e12ce15d0ea8005a589d4"
            }
          ],
          "repo": "https://github.com/nezhahq/nezha",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-x6fg-52vr-hj4w"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-284"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53520.json"
  },
  "details": "Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O\u0026M tool. From version 2.0.14 to before version 2.1.0, authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing. This issue has been patched in version 2.1.0.",
  "id": "CVE-2026-53520",
  "modified": "2026-08-04T11:31:24.022131885Z",
  "published": "2026-06-12T21:03:58.782Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53520.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/nezhahq/nezha/security/advisories/GHSA-x6fg-52vr-hj4w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53520"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing"
}