CVE-2026-62384: Nltk

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

NLTK versions before 3.10.2 contain a symlink-based sandbox bypass in FramenetCorpusReader that allows attackers to read arbitrary XML files outside the corpus root. Attackers can place symlinks with names containing no path separators inside the corpus subdirectory, which pass the path validation guard and are resolved to files outside the intended corpus root when accessed via frame_by_name(), _lu_file(), or doc() methods.

Affected products

• Nltk Nltk: from 3.10.0, before 3.10.2 (fixed in 3.10.2)

Published 2026-08-22. Last modified 2026-09-02.