MEDIUM SeverityCVSS 3.14.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVE-2026-42276
Last updated May 08, 2026 · Published May 08, 2026
Description
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
1 listed- onyx-dot-app:onyx
Mappings
CWE
CWE-639
CAPEC
None listed.
Related
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