Python

nltk

Latest secure version 3.10.1

Natural Language Toolkit

All Versions

Vulnerabilities (Public)

Known vulnerabilities and security issues detected in the extension's dependencies and code.

Vulnerability IDAdvisoryAffected Versions
CVE-2026-12075nltk – Server-Side Request Forgery (SSRF)
High
<= 3.9.4
CVE-2026-12061nltk – Regular Expression Denial of Service (ReDoS)
High
<= 3.9.4
CVE-2026-12072nltk – Path Traversal
High
<= 3.9.4
CVE-2026-12074nltk – Path Traversal
High
<= 3.9.4
CVE-2026-54293nltk – Path Traversal
High
<= 3.9.4
CVE-2026-33236Affected versions of the nltk package are vulnerable to Arbitrary File Overwrite due to improper validation of path components from remote XML index files. The vulnerability exists in nltk/downloader.…
High
<=3.9.2
CVE-2026-33231Affected versions of the nltk package are vulnerable to Denial of Service (DoS) due to missing authentication on a shutdown function in the WordNet Browser HTTP server. In nltk.app.wordnet_app, HTTPSe…
High
<=3.9.3
CVE-2026-0846NLTK has Arbitrary File Read via Absolute Path Input in nltk.util.filestring()
High
< 3.9.3
CVE-2026-33230Affected versions of the nltk package are vulnerable to Cross-site Scripting (XSS) due to improper output encoding of user-controlled input. In nltk.app.wordnet_app, requests to the lookup_... route a…
Medium
<=3.9.3
SFTY-20260320-58622nltk – Uncontrolled Recursion
Medium
<=3.9.3
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Safety Discovered Vulnerabilities

Additional security issues found by Safety, exclusive to our platform.

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Vulnerable Functions

Functions linked to known vulnerabilities in this package.

Vulnerable function data is available for Enterprise customers

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