Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| nltk / nltk | affected <= 3.9.3 |
CWE
CWE-306
References
- https://github.com/nltk/nltk/security/advisories/GHSA-jm6w-m3j8-898g
- https://github.com/nltk/nltk/commit/bbaae83db86a0f49e00f5b0db44a7254c268de9b
ADP enrichment
No English description supplied.
No references supplied.
A flaw was found in NLTK (Natural Language Toolkit), specifically in the `nltk.app.wordnet_app` component. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted GET request to the local WordNet Browser HTTP server when it is running in its default configuration. This action causes the server process to terminate immediately, leading to a denial of service.
- 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
- https://access.redhat.com/errata/RHSA-2026:24977
- https://access.redhat.com/errata/RHSA-2026:65126
- https://access.redhat.com/errata/RHSA-2026:19712
- https://access.redhat.com/errata/RHSA-2026:37275