PT-2026-79563 · Pypi · Nltk

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CVE-2026-63312

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Published

2026-08-22

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Updated

2026-09-08

CVSS v4.0

8.7

High

VectorAV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Name of the Vulnerable Software and Affected Versions NLTK versions prior to 3.10.0
Description An arbitrary local file read issue exists in StreamBackedCorpusView where the system bypasses pathsec.ENFORCE by calling builtins.open() directly instead of pathsec.open(). Attackers who control the fileid argument can read arbitrary local files, including sensitive system files and application credentials, regardless of the ENFORCE setting.
Recommendations Update NLTK to version 3.10.0 or later.

Exploit

Fix

Path traversal

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Weakness Enumeration

Related Identifiers

CVE-2026-63312
GHSA-8W48-H75V-CXPV
GHSA-X5PH-MJ9P-RFR8
PYSEC-2026-3730

Affected Products

Nltk