{
  "cveId": "CVE-2025-71408",
  "url": "https://patchblox.com/security/cve/CVE-2025-71408",
  "summary": "CVE-2025-71408 is fixed in nltk on 1 platform by DEBIAN-CVE-2025-71408 (version 3.9.3-1), released July 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "nltk: NLTK (Natural Language Toolkit) before version 3.9.3 contains an eval injection vulnerability in the nltk.collocation...",
  "description": "NLTK (Natural Language Toolkit) before version 3.9.3 contains an eval injection vulnerability in the nltk.collocations module that allows an attacker who controls command-line arguments to execute arbitrary Python code. When collocations.py is invoked directly, the __main__ block passes command-line arguments directly to eval() as suffixes of BigramAssocMeasures without allowlist validation or sanitization, enabling an attacker to supply a Python expression that escapes the intended attribute lookup and executes arbitrary code including OS commands via the os module.",
  "published": "2026-07-24T22:16:50Z",
  "severity": "",
  "epss": 0.00265,
  "epssPercentile": 0.18532,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "nltk",
      "release": "Debian 14",
      "fixedVersion": "3.9.3-1",
      "fix": "DEBIAN-CVE-2025-71408",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-71408",
      "released": "2026-07-27T14:01:26Z"
    }
  ],
  "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"
  }
}