VULNERABILITY INTELLIGENCE

CVE-2026-33231

CVSS score7.5 HIGH
EPSS probability1.24%
CISA KEVNot currently listed
Published2026-03-20
Last modified2026-09-09
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-306
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-306

Primary references