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Nltk

14 known vulnerabilities

1
CRITICAL
10
HIGH
3
MEDIUM

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nltk 14
14 CVEs
7.5
CVE-2026-66393

NLTK versions before 3.9.4 contain an unbounded recursion vulnerability in JSONTaggedDecoder.decode_obj() that allows at

5.3
CVE-2026-63311

NLTK before 3.10.0 (affected versions <= 3.9.4) contains a server-side request forgery (SSRF) vulnerability in the valid

7.5
CVE-2026-62388

NLTK versions before 3.10.0 default to ENFORCE=False in pathsec.py, causing all security validation functions to emit wa

5.5
CVE-2026-62383

nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that

7.8
CVE-2025-71408

NLTK (Natural Language Toolkit) before version 3.9.3 contains an eval injection vulnerability in the nltk.collocations m

7.8
CVE-2026-12252

In nltk/nltk versions 3.9.3 and earlier, five Stanford interface classes (StanfordPOSTagger, StanfordNERTagger, Stanford

7.5
CVE-2026-54293

NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research a

8.1
CVE-2026-33236

NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research a

7.5
CVE-2026-33231

NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research a

6.1
CVE-2026-33230

NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research a

7.5
CVE-2026-0846

A vulnerability in the `filestring()` function of the `nltk.util` module in nltk version 3.9.2 allows arbitrary file rea

10.0
CVE-2026-0848

NLTK versions <=3.9.2 are vulnerable to arbitrary code execution due to improper input validation in the StanfordSegment

7.5
CVE-2026-0847

A vulnerability in NLTK versions up to and including 3.9.2 allows arbitrary file read via path traversal in multiple Cor

8.8
CVE-2025-14009

A critical vulnerability exists in the NLTK downloader component of nltk/nltk, affecting all versions. The _unzip_iter f

Frequently Asked Questions

How many CVEs affect Nltk?

Nltk has 14 CVE records in our database, including 1 critical and 10 high severity vulnerabilities.

What are the most severe Nltk vulnerabilities?

Nltk has 1 critical severity (CVSS 9.0+) and 10 high severity (CVSS 7.0-8.9) vulnerabilities. Review the list above sorted by publication date to find the most recent high-severity issues.

How can I scan for Nltk vulnerabilities?

CyberStrike's AI-powered security agents automatically detect vulnerabilities in Nltk products across your infrastructure. The platform provides continuous pentesting, DAST scanning, and real-time vulnerability monitoring with actionable remediation guidance.

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