A vulnerability in `nltk.app.wordnet_app` up to version 3.9.3 allows unauthenticated remote shutdown of the local WordNet Browser HTTP server when started in its default mode. The server listens on all interfaces and processes a specific unauthenticated GET request (`/SHUTDOWN%20THE%20SERVER`) to terminate the process immediately via `os._exit(0)`. This results in a denial of service, impacting service availability. The issue arises due to insufficient authentication and protection mechanisms for critical server functions.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Nltk |
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OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.
| Vendors | Products |
|---|---|
| Nltk |
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References
History
Wed, 17 Jun 2026 09:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Nltk
Nltk nltk/nltk |
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| Vendors & Products |
Nltk
Nltk nltk/nltk |
Wed, 17 Jun 2026 07:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A vulnerability in `nltk.app.wordnet_app` up to version 3.9.3 allows unauthenticated remote shutdown of the local WordNet Browser HTTP server when started in its default mode. The server listens on all interfaces and processes a specific unauthenticated GET request (`/SHUTDOWN%20THE%20SERVER`) to terminate the process immediately via `os._exit(0)`. This results in a denial of service, impacting service availability. The issue arises due to insufficient authentication and protection mechanisms for critical server functions. | |
| Title | Unauthenticated Denial of Service in nltk.app.wordnet_app | |
| Weaknesses | CWE-306 | |
| References |
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| Metrics |
cvssV3_0
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MITRE
Status: PUBLISHED
Assigner: @huntr_ai
Published:
Updated: 2026-06-17T07:13:14.977Z
Reserved: 2026-06-14T09:15:42.775Z
Link: CVE-2026-12199
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-06-17T09:00:06Z