CVE-2026-33231

CVE-2026-33231 affects NLTK’s nltk.app.wordnet_app in versions 3.9.3 and earlier, where the WordNet Browser HTTP server started in default mode can be remotely shutdown by an unauthenticated GET request to /SHUTDOWN%20THE%20SERVER, causing a denial of service via os._exit(0). IBM’s bulletin/Secur...

CVE-2026-33231 NLTK has unauthenticated remote shutdown in nltk.app.wordnet_app

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.wordnetapp allows unauthenticated remote shutdown of the local WordNet Browser HTTP server whe...

EUVD-2026-13885

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.wordnetapp allows unauthenticated remote shutdown of the local WordNet Browser HTTP server whe...

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.wordnetapp allows unauthenticated remote shutdown of the local WordNet Browser HTTP server whe...

CVE-2026-33231 NLTK has unauthenticated remote shutdown in nltk.app.wordnet_app

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.wordnetapp allows unauthenticated remote shutdown of the local WordNet Browser HTTP server whe...

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. In versions 3.9.3 and prior, nltk.app.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted...

CVE-2026-33230

NLTK WordNet Browser (nltk.app.wordnet_app) in versions <= 3.9.3 contains a reflected XSS in the lookup_ route, where attacker-controlled word data is echoed into HTML without escaping, enabling arbitrary HTML/JS execution in the local browser context. Public advisories and vendor notices conf...

CVE-2026-33230 nltk Vulnerable to Cross-site Scripting

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.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted...

CVE-2026-33230 nltk Vulnerable to Cross-site Scripting

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.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted...

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. In versions 3.9.3 and prior, nltk.app.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted...

CVE-2026-33230 nltk Vulnerable to Cross-site Scripting

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.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted...

NLTK 跨站脚本漏洞

NLTK is an open-source natural language toolkit developed by NLTK. It is used to support research and development in natural language processing. Versions of NLTK 3.9.3 and earlier had a cross-site scripting vulnerability. This vulnerability stemmed from the lookup... route in nltk.app.wordnetapp...

NLTK 访问控制错误漏洞

NLTK is an open-source natural language toolkit developed by NLTK. It is used to support research and development in natural language processing. Versions of NLTK 3.9.3 and earlier contained a access control vulnerability. This vulnerability stemmed from nltk.app.wordnetapp, which allowed...

CVE-2026-33230: Improper Neutralization of Input During Web Page Generation

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.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted...

Unauthenticated remote shutdown in nltk.app.wordnet_app

Summary nltk.app.wordnetapp 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.exit0, resulting in a denial of service. Details The...

Missing Authentication for Critical Function

Overview nltk is a Natural Language Toolkit NLTK is a Python package for natural language processing. Affected versions of this package are vulnerable to Missing Authentication for Critical Function in WordNet Browser HTTP server in default configuration. An attacker can cause the service to...

GHSA-JM6W-M3J8-898G Unauthenticated remote shutdown in nltk.app.wordnet_app

Summary nltk.app.wordnetapp 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.exit0, resulting in a denial of service. Details The...

Unauthenticated remote shutdown in nltk.app.wordnet_app

Summary nltk.app.wordnetapp 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.exit0, resulting in a denial of service. Details The...

PT-2026-26299

Name of the Vulnerable Software and Affected Versions NLTK versions 3.9.3 and prior Description NLTK’s nltk.app.wordnet app component allows unauthenticated remote shutdown of the local WordNet Browser HTTP server when started in its default mode. A simple GET /SHUTDOWN%20THE%20SERVER request to...

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in nltk

Summary nltk.app.wordnetapp contains a reflected cross-site scripting issue in the lookup... route. A crafted lookup URL can inject arbitrary HTML/JavaScript into the response page because attacker-controlled word data is reflected into HTML without escaping. This impacts users running the local...