{
  "cveId": "CVE-2025-23167",
  "url": "https://patchblox.com/security/cve/CVE-2025-23167",
  "summary": "CVE-2025-23167 is fixed in 20 products on 2 platforms, first by Node.js 20 20.19.2, released May 14, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "A flaw in Node.js 20\u0027s HTTP parser allows improper termination of HTTP/1 headers using \u0060\\r\\n\\rX\u0060 instead of the required \u0060\\r\\n\\r\\n\u0060.\nThis inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests.\n\nThe issue was resolved by upgrading \u0060llhttp\u0060 to version 9, which enforces correct header termination.\n\nImpact:\n* This vulnerability affects only Node.js 20.x users prior to the \u0060llhttp\u0060 v9 upgrade.",
  "description": "A flaw in Node.js 20\u0027s HTTP parser allows improper termination of HTTP/1 headers using \u0060\\r\\n\\rX\u0060 instead of the required \u0060\\r\\n\\r\\n\u0060.\nThis inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests.\n\nThe issue was resolved by upgrading \u0060llhttp\u0060 to version 9, which enforces correct header termination.\n\nImpact:\n* This vulnerability affects only Node.js 20.x users prior to the \u0060llhttp\u0060 v9 upgrade.",
  "published": "2025-05-19T02:15:17Z",
  "severity": "Moderate",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
  "epss": 0.00508,
  "epssPercentile": 0.43614,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-23167",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Node.js 20",
      "fixedVersion": "20.19.2",
      "fix": "Node.js 20 20.19.2",
      "url": "https://patchblox.com/security/fix/windows-app/openjs.nodejs.20-20.19.2",
      "released": "2025-05-14T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "node-undici",
      "release": "Debian 14",
      "fixedVersion": "7.15.0\u002Bdfsg\u002B~cs3.2.0-1",
      "fix": "DEBIAN-CVE-2025-23167",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-23167",
      "released": "2025-05-19T02:15:17Z"
    },
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      "release": "RHEL 8",
      "fixedVersion": "1:20.19.2-1.module\u002Bel8.10.0\u002B23139\u002B21ba74c5",
      "fix": "RHSA-2025:8514",
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      "released": "2025-06-04T00:00:00Z"
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      "url": "https://patchblox.com/security/fix/linux/rlsa-2025-8514",
      "released": "2025-07-29T13:38:41Z"
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      "fix": "RLSA-2025:8468",
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  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}