{
  "cveId": "CVE-2026-8159",
  "url": "https://patchblox.com/security/cve/CVE-2026-8159",
  "summary": "CVE-2026-8159 is fixed in node-multiparty on 1 platform by DEBIAN-CVE-2026-8159 (version 4.3.0-1), released May 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "node-multiparty: multiparty@4.2.3 and lower versions are vulnerable to denial of service via regular expression backtracking in the Co...",
  "description": "multiparty@4.2.3 and lower versions are vulnerable to denial of service via regular expression backtracking in the Content-Disposition filename parameter parser. A crafted multipart upload with a long header value can cause regex matching to take seconds, blocking the event loop. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: limiting upload sizes at the proxy or gateway layer reduces but does not eliminate the attack surface, since a small header of around 8 KB is sufficient to trigger the vulnerable backtracking. Upgrade to multiparty@4.3.0 or higher.",
  "published": "2026-05-12T10:16:48Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00335,
  "epssPercentile": 0.26983,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "node-multiparty",
      "release": "Debian 14",
      "fixedVersion": "4.3.0-1",
      "fix": "DEBIAN-CVE-2026-8159",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-8159",
      "released": "2026-05-27T17:38:13Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}