CVE-2026-33230
NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing.
Published Mar 20, 2026 · updated Jun 17, 2026 · nltk nltk
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, contains a reflected cross-site scripting issue in the route. A crafted URL can inject arbitrary HTML/JavaScript into the response page because attacker-controlled data is reflected into HTML without escaping. This impacts users running the local WordNet Browser server and can lead to script execution in the browser origin of that application. Commit 1c3f799607eeb088cab2491dcf806ae83c29ad8f fixes the issue.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Mar 20, 2026 · NIST NVD
Detected
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, contains a reflected cross-site scripting issue in the route. A crafted URL can inject arbitrary HTML/JavaScript into the response page because attacker-controlled data is reflected into HTML without esca
Jun 17, 2026 · NIST NVD
Updated
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, contains a reflected cross-site scripting issue in the route. A crafted URL can inject arbitrary HTML/JavaScript into the response page because attacker-controlled data is reflected into HTML without esca
Affected
- cpe nltk/nltkversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-33230
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-33230
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, contains a reflected cross-site scripting issue in the `looku
nvd.nist.gov