Bug 2521338 (CVE-2026-70626) - CVE-2026-70626 nltk: NLTK: Information disclosure via symlink escape in CorpusReader.open()
Summary: CVE-2026-70626 nltk: NLTK: Information disclosure via symlink escape in Corpu...
Keywords:
Status: NEW
Alias: CVE-2026-70626
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-22 14:32 UTC by OSIDB Bzimport
Modified: 2026-08-31 07:39 UTC (History)
19 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-22 14:32:05 UTC 
NLTK versions before 3.9.4 contain a symlink escape vulnerability in CorpusReader.open() that allows local attackers to read arbitrary files outside the corpus root. The vulnerability exists because path validation is lexical and does not account for symlink resolution, enabling attackers to place symlinks inside the corpus root to access files outside the intended boundary.
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