PYSEC-2026-3732

vendorUSosv
view advisory published 2026-08-22Licence: CC-BY-4.0

NLTK versions before 3.9.4 contain a symlink escape vulnerability in CorpusReader.open() that allows local attackers to read arbitrary files outside the corpus root. The vulnerability exists because path validation is lexical and does not account for symlink resolution, enabling attackers to place symlinks inside the corpus root to access files outside the intended boundary.

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describes (1)

Related CVEs.

IDseverity exploitable
CVE-2026-70626USmedium6.2—
NLTK versions before 3.9.4 contain a symlink escape vulnerability in CorpusReader.open() that allows local attackers to read arbitrary files outside the corpus root. The vulnerabil…
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