{
  "cveId": "CVE-2026-59879",
  "url": "https://patchblox.com/security/cve/CVE-2026-59879",
  "summary": "CVE-2026-59879 is fixed in node-immutable on 1 platform by DEBIAN-CVE-2026-59879 (version 4.3.9-1), released July 8, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "node-immutable: Immutable.js provides many Persistent Immutable data structures",
  "description": "Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, List#set, List#setSize, List#setIn, List#updateIn, and the functional set, setIn, and updateIn mishandle an index or size in the range 2 ** 30 to 2 ** 31 in setListBounds in src/List.js, causing an empty List to enter an uncatchable infinite loop, a populated List to allocate without bound until process abort, or setSize to silently wrap large values. This issue is fixed in versions 4.3.9 and 5.1.8.",
  "published": "2026-07-08T17:17:26Z",
  "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": 0.00575,
  "epssPercentile": 0.47711,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "node-immutable",
      "release": "Debian 14",
      "fixedVersion": "4.3.9-1",
      "fix": "DEBIAN-CVE-2026-59879",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-59879",
      "released": "2026-07-08T17:17:26Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}