CVE-2026-33231

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.

• CWE-306
• CWE-306

• https://github.com/nltk/nltk/commit/bbaae83db86a0f49e00f5b0db44a7254c268de9bPatch
• https://github.com/nltk/nltk/security/advisories/GHSA-jm6w-m3j8-898gExploit, Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:19712
• https://access.redhat.com/errata/RHSA-2026:24977
• https://access.redhat.com/errata/RHSA-2026:37275
• https://access.redhat.com/security/cve/CVE-2026-33231
• https://bugzilla.redhat.com/show_bug.cgi?id=2449836
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33231.json

Published

Mar 20, 2026

Last Modified

Jul 15, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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