CVE-2026-12199
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.
- Affected products
- Nltk
- Fix
- Available
- CVSS 3.0
- 7.5 HIGH
- EPSS
- 0.3% (25th percentile)
- Weakness
- CWE-306
- NVD status
- Deferred
- Published
- 2026-06-17
No indexed exploits for CVE-2026-12199 yet
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No exploit for CVE-2026-12199 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.