Bug#1131459: nltk: CVE-2026-33231

[Salvatore Bonaccorso]

Source: nltk
Version: 3.9.3-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for nltk.

CVE-2026-33231[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-33231
    https://www.cve.org/CVERecord?id=CVE-2026-33231
[1] https://github.com/nltk/nltk/security/advisories/GHSA-jm6w-m3j8-898g
[2] https://github.com/nltk/nltk/commit/1b6a569d7bab2c697bc1fc245f55ac0102079c18

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore