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
onyx: onyx
References2
- github.com/onyx-dot-app/onyx/security/advisories/GHSA-rw6w-hp62… ExploitVendor Advisory
- github.com/onyx-dot-app/onyx/security/advisories/GHSA-rw6w-hp62… ExploitVendor Advisory
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - EPSS — exploit probability
- 0% percentile: 21 · as of 13 November 2026
- CWE
- CWE-639
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