{
  "cveId": "CVE-2026-33236",
  "url": "https://patchblox.com/security/cve/CVE-2026-33236",
  "summary": "CVE-2026-33236 is fixed in 3 products on 1 platform, first by python-nltk 3.2.5-1ubuntu0.1\u002Besm4, released March 20, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "nltk: NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting researc...",
  "description": "NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. In versions 3.9.3 and prior, the NLTK downloader does not validate the \u0060subdir\u0060 and \u0060id\u0060 attributes when processing remote XML index files. Attackers can control a remote XML index server to provide malicious values containing path traversal sequences (such as \u0060../\u0060), which can lead to arbitrary directory creation, arbitrary file creation, and arbitrary file overwrite. Commit 89fe2ec2c6bae6e2e7a46dad65cc34231976ed8a patches the issue.",
  "published": "2026-03-20T16:16:00Z",
  "severity": "high",
  "cvss": 8.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
  "epss": 0.00613,
  "epssPercentile": 0.49606,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "nltk",
      "release": "Debian 14",
      "fixedVersion": "3.10.0-1",
      "fix": "DEBIAN-CVE-2026-33236",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33236",
      "released": "2026-03-20T23:16:47Z"
    },
    {
      "platform": "linux",
      "product": "python-nltk",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.2.5-1ubuntu0.1\u002Besm4",
      "fix": "python-nltk 3.2.5-1ubuntu0.1\u002Besm4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-nltk-3.2.5-1ubuntu0.1-esm4",
      "released": "2026-03-20T16:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-nltk",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.2.5-1ubuntu0.1\u002Besm4",
      "fix": "python3-nltk 3.2.5-1ubuntu0.1\u002Besm4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-nltk-3.2.5-1ubuntu0.1-esm4",
      "released": "2026-03-20T16:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-nltk",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.4.5-2ubuntu0.1~esm4",
      "fix": "python3-nltk 3.4.5-2ubuntu0.1~esm4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-nltk-3.4.5-2ubuntu0.1-esm4",
      "released": "2026-03-20T16:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-nltk",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.7-1ubuntu0.1~esm2",
      "fix": "python3-nltk 3.7-1ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3-nltk-3.7-1ubuntu0.1-esm2",
      "released": "2026-03-20T16:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-nltk",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.8.1-1ubuntu0.1~esm2",
      "fix": "python3-nltk 3.8.1-1ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-python3-nltk-3.8.1-1ubuntu0.1-esm2",
      "released": "2026-03-20T16:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-nltk",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.9.2-1ubuntu0.1~esm2",
      "fix": "python3-nltk 3.9.2-1ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-python3-nltk-3.9.2-1ubuntu0.1-esm2",
      "released": "2026-03-20T16:16:00Z"
    }
  ],
  "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"
  }
}