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PYSEC-2026-3737
Quick fix
PYSEC-2026-3737 — nltk: upgrade to the fixed version with the command below.
pip install --upgrade 'nltk>=3.10.3'Details
NLTK versions before 3.10.3 contain a path traversal vulnerability in corpus readers that reopen root-derived paths using built-in open() instead of nltk.pathsec.open(), allowing symlinks to escape trusted roots. Attackers who stage symlinked corpus files under a trusted data root can disclose outside-root content through normal corpus reader methods like channels(), domains(), and synonyms().
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