{
  "cveId": "CVE-2025-27209",
  "url": "https://patchblox.com/security/cve/CVE-2025-27209",
  "summary": "CVE-2025-27209 is fixed in Node.js on 1 platform by Node.js 24.4.1 (version 24.4.1), released July 15, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Node.js: Inefficient Algorithmic Complexity",
  "description": "The V8 release used in Node.js v24.0.0 has changed how string hashes are computed using rapidhash. This implementation re-introduces the HashDoS vulnerability as an attacker who can control the strings to be hashed can generate many hash collisions - an attacker can generate collisions even without knowing the hash-seed.\r\n\r\n* This vulnerability affects Node.js v24.x users.",
  "published": "2025-07-18T23:15:23Z",
  "severity": "",
  "cvss": 7.5,
  "cwe": "CWE-407: Inefficient Algorithmic Complexity",
  "epss": 0.01253,
  "epssPercentile": 0.69652,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2025-27209",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Node.js",
      "fixedVersion": "24.4.1",
      "fix": "Node.js 24.4.1",
      "url": "https://patchblox.com/security/fix/windows-app/openjs.nodejs-24.4.1",
      "released": "2025-07-15T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}