Arbitrary Code Injection Affecting nltk package, versions [,3.9.3)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-NLTK-15317401
- published19 Feb 2026
- disclosed18 Feb 2026
- creditSarvesh Patil
Introduced: 18 Feb 2026
CVE-2025-14009 (opens in a new tab)How to fix?
Upgrade nltk to version 3.9.3 or higher.
Overview
nltk is a Natural Language Toolkit (NLTK) is a Python package for natural language processing.
Affected versions of this package are vulnerable to Arbitrary Code Injection via the _unzip_iter() function due to the lack of validation before unpacking untrusted downloaded packages. An attacker can execute arbitrary code by supplying a specially crafted zip file.