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PYSEC-2026-3726
Quick fix
PYSEC-2026-3726 — nltk: upgrade to the fixed version with the command below.
pip install --upgrade 'nltk>=3.10.2'Details
nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely. Attackers can place a symlink in the corpus root directory and read arbitrary files accessible to the process by calling channels(), domains(), categories(), or fileids() methods with the symlink filename.
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