Bug 2449824 (CVE-2026-33236) - CVE-2026-33236 nltk: NLTK: Arbitrary file overwrite and creation via path traversal in XML index files
Summary: CVE-2026-33236 nltk: NLTK: Arbitrary file overwrite and creation via path tra...
Keywords:
Status: NEW
Alias: CVE-2026-33236
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-20 23:02 UTC by OSIDB Bzimport
Modified: 2026-03-23 06:38 UTC (History)
27 users (show)

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Description OSIDB Bzimport 2026-03-20 23:02:14 UTC 
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 3.9.3 and prior, the NLTK downloader does not validate the `subdir` and `id` attributes when processing remote XML index files. Attackers can control a remote XML index server to provide malicious values containing path traversal sequences (such as `../`), which can lead to arbitrary directory creation, arbitrary file creation, and arbitrary file overwrite. Commit 89fe2ec2c6bae6e2e7a46dad65cc34231976ed8a patches the issue.
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