CVE-2026-12199 — Unauthenticated Denial of Service in nltk.app.wordnet_app
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. T…
Published: 2026-06-17 · CVSS: 7.5 · CVSS 3.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7