CVEvulnerability
CVE-2026-33231
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-03-20
- Last modified
- 2026-09-09
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-306
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.
Affected configurations
• nltk nltk (<= 3.9.3)
Related
Weakness · CWE (1)
- CWE-306 Missing Authentication for Critical Functionality weakness
References
- https://github.com/nltk/nltk/commit/bbaae83db86a0f49e00f5b0db44a7254c268de9b Patch
- https://github.com/nltk/nltk/security/advisories/GHSA-jm6w-m3j8-898g Exploit, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:19712 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:24977 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:37275 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:65126 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-33231 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2449836 bugzilla.redhat.com
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33231.json security.access.redhat.com