BREW-SAFETY-CVE-2024-39705 (GHSA-CGVX-9447-VCCH)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:33 – Updated: 2026-09-10 01:10 – Source website
VLAI
Summary
ntlk unsafe deserialization vulnerability
Details

NLTK through 3.8.1 allows remote code execution if untrusted packages have pickled Python code, and the integrated data package download functionality is used. This affects, for example, averaged_perceptron_tagger and punkt.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5 (High)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "nltk",
        "resource_purl": "pkg:pypi/nltk@3.10.3",
        "upstream_fixed_in": "3.9"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "safety",
        "purl": "pkg:brew/safety"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.8.1_1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/nltk@3.10.3",
        "name": "nltk",
        "resource": "nltk",
        "strategy": "registry",
        "subject_version": "3.10.3"
      }
    ]
  },
  "details": "NLTK through 3.8.1 allows remote code execution if untrusted packages have pickled Python code, and the integrated data package download functionality is used. This affects, for example, averaged_perceptron_tagger and punkt.",
  "id": "BREW-safety-CVE-2024-39705",
  "modified": "2026-09-10T01:10:54Z",
  "published": "2026-08-13T17:33:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-39705"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nltk/nltk/issues/2522"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nltk/nltk/issues/3266"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nltk/nltk/commit/441aecb7d33014bd08672232c6c8bb69c2ceaba2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nltk/nltk"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2024-167.yaml"
    },
    {
      "type": "WEB",
      "url": "https://www.vicarius.io/vsociety/posts/rce-in-python-nltk-cve-2024-39705-39706"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "ntlk unsafe deserialization vulnerability",
  "upstream": [
    "GHSA-cgvx-9447-vcch",
    "CVE-2024-39705",
    "PYSEC-2024-167"
  ]
}



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