Security advisory

{
  "id": "f3c9eedca12de3ae9c56e7a742d7c16a050001d6a279beaaecfe0ddab6db517c",
  "url": "https://osv.dev/vulnerability/CVE-2024-39705",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2024-39705",
    "summary": "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.",
    "evidence": "osv:CVE-2024-39705",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2024-39705",
      "aliases": [
        "CVE-2024-39705",
        "GHSA-cgvx-9447-vcch",
        "PYSEC-2024-167"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nltk/nltk",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "63a63b1a7793aceceb1efc23bc1fd87e7095f9d5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.8.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.8.1",
            "3.8",
            "3.7",
            "3.6.7",
            "3.6.6",
            "3.6.5",
            "3.6.2",
            "3.6.1",
            "3.6",
            "3.5",
            "3.5b1",
            "3.4.4",
            "3.4.3",
            "3.4.1",
            "3.4",
            "3.3",
            "3.2.5",
            "3.2.4",
            "3.2.3",
            "3.2.2",
            "3.2.1",
            "3.2",
            "3.1",
            "3.0.5",
            "3.0.4",
            "3.0.3",
            "3.0.2",
            "3.0.0b1",
            "3.0a4",
            "2.0.1rc4",
            "2.0.1rc3",
            "2.0.1rc2",
            "2.0.1rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39705.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.985532361Z",
      "provider": "osv",
      "references": [
        "https://www.vicarius.io/vsociety/posts/rce-in-python-nltk-cve-2024-39705-39706",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39705.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-39705",
        "https://github.com/nltk/nltk/issues/2522",
        "https://github.com/nltk/nltk/issues/3266"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39705.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-39705",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 514155,
  "published_at": "2024-06-27T00:00:00+00:00"
}