Bug 2521343 (CVE-2026-65915) - CVE-2026-65915 nltk: NLTK: Arbitrary file read due to logic bug in FileSystemPathPointer
Summary: CVE-2026-65915 nltk: NLTK: Arbitrary file read due to logic bug in FileSystem...
Keywords:
Status: NEW
Alias: CVE-2026-65915
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: 2026-08-27 08:29 UTC (History)
19 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-22 14:32:20 UTC 
NLTK versions before 3.10.0 contain a logic bug in FileSystemPathPointer.open() where the sandbox validation check compares a normalized path against itself, making the security check permanently inert. Attackers can pass file:// URLs to nltk.data.load() to read arbitrary files accessible to the process user, including credentials and configuration files.
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