CVE-2026-12199 | THREATINT

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.

PUBLISHED Reserved 2026-06-14 | Published 2026-06-17 | Updated 2026-06-17 | Assigner @huntr_ai

HIGH: 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-306 Missing Authentication for Critical Function

Product status

Any version

affected

References

huntr.com/bounties/cee4ca6a-d17f-4746-abad-c68119633d37

cve.org (CVE-2026-12199)

nvd.nist.gov (CVE-2026-12199)

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