ETK-2026-107Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-107",
  "cve_id": null,
  "display_id": "ETK-2026-107",
  "ghsa_id": null,
  "euvd_id": null,
  "status": "retired",
  "anchor_state": "awaiting_cve",
  "title": "Path validation bypass in NLTK WekaClassifier",
  "summary": "NLTK WekaClassifier accepts model file paths without applying its path-containment checks in affected releases, including 3.10.3. An attacker who can control a model path in an application using this wrapper may cause Weka to write outside approved data directories or probe a chosen file through model loading, even when path enforcement is enabled.",
  "mitigation": "Do not permit untrusted users or workflows to select WekaClassifier model paths; enforce an application-level allowlist rooted in approved NLTK data directories. Apply the upstream WekaClassifier path-validation patch when building from source, and track NLTK for the first release that includes it.",
  "vendor": "pip",
  "product": "nltk",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 3.10.3"
      ],
      "ecosystem": "pip",
      "fixed_versions": [],
      "package_name": "nltk",
      "purl": "pkg:pypi/nltk"
    }
  ],
  "cwes": [
    22
  ],
  "cvss_score": 8.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": null,
  "t0_at": null,
  "signals": {}
}