Eval Injection Affecting nltk package, versions [,3.9.3)
Threat Intelligence
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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Test your applications- Snyk IDSNYK-PYTHON-NLTK-18313041
- published26 Jul 2026
- disclosed24 Jul 2026
- creditYunus Aydın
Introduced: 24 Jul 2026
NewCVE-2025-71408 (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 Eval Injection via the __main__ process in collocations.py when command-line arguments are passed directly to the eval function without proper validation or sanitization. An attacker can execute arbitrary Python code, including operating system commands, by supplying crafted command-line arguments.