{
  "canonical_id": "undici--CVE-2025-22150",
  "system_id": "undici",
  "display_name": "Undici",
  "category": "frameworks",
  "advisory_mode": "core",
  "title": "Use of Insufficiently Random Values in undici",
  "summary": "### Impact\n\n[Undici `fetch()` uses Math.random()](https://github.com/nodejs/undici/blob/8b06b8250907d92fead664b3368f1d2aa27c1f35/lib/web/fetch/body.js#L113) to choose the boundary for a multipart/form-data request. It is known that the output of Math.random() can be predicted if several of its generated values are known.\n\nIf there is a mechanism in an app that sends multipart requests to an attacker-controlled website, they can use this to leak the necessary values. Therefore, An attacker can tamper with the requests going to the backend APIs if certain conditions are met.\n\n### Patches\n\nThis is fixed in 5.28.5; 6.21.1; 7.2.3.\n\n### Workarounds\n\nDo not issue multipart requests to attacker controlled servers.\n\n### References\n\n* https://hackerone.com/reports/2913312\n* https://blog.securityevaluators.com/hacking-the-javascript-lottery-80cc437e3b7f\n",
  "published_at": "2025-01-21T21:10:47Z",
  "updated_at": "2026-02-04T02:29:26.373390Z",
  "severity": "low",
  "cvss_score": 3.1,
  "exploit_status": "unknown",
  "source_confidence": "official",
  "official_source_url": "https://github.com/nodejs/undici/security/advisories/GHSA-c76h-2ccp-4975",
  "secondary_source_urls": [
    "https://nvd.nist.gov/vuln/detail/CVE-2025-22150",
    "https://github.com/nodejs/undici/commit/711e20772764c29f6622ddc937c63b6eefdf07d0",
    "https://github.com/nodejs/undici/commit/c2d78cd19fe4f4c621424491e26ce299e65e934a",
    "https://github.com/nodejs/undici/commit/c3acc6050b781b827d80c86cbbab34f14458d385",
    "https://hackerone.com/reports/2913312",
    "https://blog.securityevaluators.com/hacking-the-javascript-lottery-80cc437e3b7f",
    "https://github.com/nodejs/undici",
    "https://github.com/nodejs/undici/blob/8b06b8250907d92fead664b3368f1d2aa27c1f35/lib/web/fetch/body.js#L113"
  ],
  "aliases": [
    "CVE-2025-22150",
    "GHSA-c76h-2ccp-4975"
  ],
  "cve_ids": [
    "CVE-2025-22150"
  ],
  "ghsa_ids": [
    "GHSA-c76h-2ccp-4975"
  ],
  "osv_ids": [
    "GHSA-c76h-2ccp-4975"
  ],
  "affected_versions": [
    "introduced=4.5.0, fixed<5.28.5",
    "introduced=6.0.0, fixed<6.21.1",
    "introduced=7.0.0, fixed<7.2.3"
  ],
  "fixed_versions": [
    "5.28.5",
    "6.21.1",
    "7.2.3"
  ],
  "package_name": "undici",
  "render_markdown": true,
  "case_path": "07-framework-security/frameworks/undici/cases/undici-cve-2025-22150.md",
  "secure_code_topics": [
    "ssrf-url-validation",
    "proxy-trust-boundary"
  ],
  "status": "generated",
  "triage_reasons": [],
  "metadata": {
    "source_names": [
      "OSV Undici"
    ],
    "source_kinds": [
      "osv-batch"
    ],
    "candidate_count": 1
  }
}