CVE-2026-33236

A flaw was found in NLTK Natural Language Toolkit, a suite of open-source Python modules for Natural Language Processing. The NLTK downloader does not validate subdir and id attributes when processing remote XML index files. A remote attacker can exploit this path traversal vulnerability by...

PYSEC-2026-2237

NLTK Natural Language Toolkit is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. In versions 3.9.3 and prior, the NLTK downloader does not validate the subdir and id attributes when processing remote XML index...

NLTK has a Downloader Path Traversal Vulnerability (AFO) - Arbitrary File Overwrite

Vulnerability Description The NLTK downloader does not validate the subdir and id attributes when processing remote XML index files. Attackers can control a remote XML index server to provide malicious values containing path traversal sequences such as ../, which can lead to: 1. Arbitrary Directo...

GHSA-469J-VMHF-R6V7 NLTK has a Downloader Path Traversal Vulnerability (AFO) - Arbitrary File Overwrite

Vulnerability Description The NLTK downloader does not validate the subdir and id attributes when processing remote XML index files. Attackers can control a remote XML index server to provide malicious values containing path traversal sequences such as ../, which can lead to: 1. Arbitrary Directo...

PT-2026-26300

Name of the Vulnerable Software and Affected Versions NLTK versions 3.9.3 and prior Description NLTK Natural Language Toolkit is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. The NLTK downloader does not validat...