Bug 2449836 (CVE-2026-33231) - CVE-2026-33231 nltk: NLTK: Denial of Service via unauthenticated remote shutdown
Summary: CVE-2026-33231 nltk: NLTK: Denial of Service via unauthenticated remote shutdown
Keywords:
Status: NEW
Alias: CVE-2026-33231
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-20 23:03 UTC by OSIDB Bzimport
Modified: 2026-03-23 06:38 UTC (History)
27 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-03-20 23:03:01 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, `nltk.app.wordnet_app` allows unauthenticated remote shutdown of the local WordNet Browser HTTP server when it is started in its default mode. A simple `GET /SHUTDOWN%20THE%20SERVER` request causes the process to terminate immediately via `os._exit(0)`, resulting in a denial of service. Commit bbaae83db86a0f49e00f5b0db44a7254c268de9b patches the issue.
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