CVE-2019-14751: Nltk

High severity, CVSS 7.5. EPSS: 5.7% chance of exploitation in the next 30 days.

NLTK Downloader before 3.4.5 is vulnerable to a directory traversal, allowing attackers to write arbitrary files via a ../ (dot dot slash) in an NLTK package (ZIP archive) that is mishandled during extraction.

Affected products

• Nltk Nltk: before 3.4.5 (fixed in 3.4.5)

Published 2019-08-22. Last modified 2026-06-17.