PT-2026-79557 · Pypi · Nltk

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CVE-2026-62383

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Published

2026-08-07

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Updated

2026-09-08

CVSS v4.0

6.8

Medium

VectorAV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Name of the Vulnerable Software and Affected Versions nltk versions prior to 3.10.2
Description An arbitrary file read issue exists in the IPIPANCorpusReader methods that bypasses nltk.pathsec validation. An attacker can place a symlink in the corpus root directory to read arbitrary files accessible to the process by calling the channels(), domains(), categories(), or fileids() methods using the symlink filename.
Recommendations Update nltk to version 3.10.2 or later.

Exploit

Fix

Link Following

Path traversal

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Weakness Enumeration

Related Identifiers

BDU:2026-13474
CVE-2026-62383
GHSA-343M-9FQQ-97C7
GHSA-3HHW-38PF-PXJ6
PYSEC-2026-3726

Affected Products

Nltk