cvedb.io
CVE-2026-42276
MEDIUM · CVSS 4.3
EPSS exploitation probability: 0%
Published 2026-05-08T05:16:10.557 · Last modified 2026-06-17T10:47:37.107

Summary

Onyx is an open-source AI platform. Prior to versions 3.0.9, 3.1.6, and 3.2.6, the POST /chat/stop-chat-session/{chat_session_id} endpoint lets any authenticated user stop any other user's active chat session. The endpoint checks authentication but never verifies the session belongs to the caller. An attacker who knows a chat session UUID can kill another user's LLM generation mid-stream. This issue has been patched in versions 3.0.9, 3.1.6, and 3.2.6.

Affected products

onyx — onyx

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.