{
  "cveId": "CVE-2026-66393",
  "url": "https://patchblox.com/security/cve/CVE-2026-66393",
  "summary": "CVE-2026-66393 is fixed in nltk on 1 platform by DEBIAN-CVE-2026-66393 (version 3.10.0-1), released August 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "nltk: NLTK versions before 3.9.4 contain an unbounded recursion vulnerability in JSONTaggedDecoder.decode_obj() that allows...",
  "description": "NLTK versions before 3.9.4 contain an unbounded recursion vulnerability in JSONTaggedDecoder.decode_obj() that allows attackers to cause denial of service by supplying deeply nested JSON structures. Attackers can craft JSON payloads exceeding the recursion limit to trigger an unhandled RecursionError that crashes the Python process.",
  "published": "2026-08-22T15:16:19Z",
  "severity": "",
  "epss": 0.00521,
  "epssPercentile": 0.44507,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "nltk",
      "release": "Debian 14",
      "fixedVersion": "3.10.0-1",
      "fix": "DEBIAN-CVE-2026-66393",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-66393",
      "released": "2026-08-22T23:48:30Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}