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nltk / nltk CVEs

Beta · best-effort

14 CVEs tagged to nltk / nltk1 Critical, 12 High, 1 Medium, 0 Low, 0 Unrated.

CVE-2026-12252

Published Jul 4, 2026

In nltk/nltk versions 3.9.3 and earlier, five Stanford interface classes (StanfordPOSTagger, StanfordNERTagger, StanfordParser, StanfordDependencyParser, and StanfordNeuralDepende…

CVSS 7.8 · High
evidence mentions
1
Buzz score
11.9
Vendor/product tagsBeta · best-effort

CVE-2026-12243

Published Jun 30, 2026

NLTK version 3.9.4 is vulnerable to a path traversal attack due to an incomplete fix for GitHub Issue #3504. The `_UNSAFE_NO_PROTOCOL_RE` regex in `nltk/data.py` checks for litera…

CVSS 7.5 · High
evidence mentions
1
Buzz score
11.9
Vendor/product tagsBeta · best-effort

CVE-2026-54293

Published Jun 22, 2026

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 3.1…

CVSS 7.5 · High
evidence mentions
6
Buzz score
32.5
Vendor/product tagsBeta · best-effort

CVE-2026-33236

Published Mar 20, 2026

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…

CVSS 8.1 · High
evidence mentions
9
Buzz score
36.0
Vendor/product tagsBeta · best-effort

CVE-2026-33231

Published Mar 20, 2026

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…

CVSS 7.5 · High
evidence mentions
8
Buzz score
35.0
Vendor/product tagsBeta · best-effort

CVE-2026-33230

Published Mar 20, 2026

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…

CVSS 6.1 · Medium
evidence mentions
3
Buzz score
18.9
Vendor/product tagsBeta · best-effort

CVE-2026-0846

Published Mar 9, 2026

A vulnerability in the `filestring()` function of the `nltk.util` module in nltk version 3.9.2 allows arbitrary file read due to improper validation of input paths. The function d…

CVSS 7.5 · High
evidence mentions
6
Buzz score
32.5
Vendor/product tagsBeta · best-effort

CVE-2026-0848

Published Mar 5, 2026

NLTK versions <=3.9.2 are vulnerable to arbitrary code execution due to improper input validation in the StanfordSegmenter module. The module dynamically loads external Java .jar…

CVSS 10.0 · Critical
evidence mentions
1
Buzz score
11.9
Vendor/product tagsBeta · best-effort

CVE-2026-0847

Published Mar 4, 2026

A vulnerability in NLTK versions up to and including 3.9.2 allows arbitrary file read via path traversal in multiple CorpusReader classes, including WordListCorpusReader, TaggedCo…

CVSS 7.5 · High
evidence mentions
6
Buzz score
32.5
Vendor/product tagsBeta · best-effort

CVE-2025-14009

Published Feb 18, 2026

A critical vulnerability exists in the NLTK downloader component of nltk/nltk, affecting all versions. The _unzip_iter function in nltk/downloader.py uses zipfile.extractall() wit…

CVSS 8.8 · High
evidence mentions
5
Buzz score
30.9
Vendor/product tagsBeta · best-effort

CVE-2021-43854

Published Dec 23, 2021

NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. Versions pri…

CVSS 7.5 · High
Vendor/product tagsBeta · best-effort

CVE-2019-14751

Published Aug 22, 2019

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…

CVSS 7.5 · High
Vendor/product tagsBeta · best-effort
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