GHSA-M42H-3232-VPV3 nltk: Arbitrary File Read via Path Traversal in nltk.data.load() through Percent-Encoded Sequences

Summary nltk.data.load and nltk.data.find resolve user-supplied resource names to filesystem paths using url2pathname, which decodes percent-encoded sequences e.g. %2e%2e to ... Path safety checks are performed on the raw, still-encoded string before decoding occurs. An attacker supplying %2e%2e...

GHSA-Q5H6-FCF5-49G9 Duplicate Advisory: Arbitrary File Read via Path Traversal in nltk.data.load() through Percent-Encoded Sequences

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-m42h-3232-vpv3. This link is maintained to preserve external references. Original Description NLTK version 3.9.4 is vulnerable to a path traversal attack due to an incomplete fix for GitHub Issue 3504. The...

CVE-2026-54293: Improper Limitation of a Pathname to a Restricted Directory

NLTK Natural Language Toolkit is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. Prior to 3.10.0-rc1, nltk.data.load in NLTK is vulnerable to path traversal via URL-encoded path separators and traversal segments...