Medium severity4.3NVD Advisory· Published May 8, 2026· Updated May 12, 2026
CVE-2026-42276
CVE-2026-42276
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3<3.0.9,>=3.1.0,<3.1.6,>=3.2.0,<3.2.6+ 2 more
- (no CPE)range: <3.0.9,>=3.1.0,<3.1.6,>=3.2.0,<3.2.6
- cpe:2.3:a:onyx:onyx:*:*:*:*:*:*:*:*range: <3.0.9
- (no CPE)range: <3.0.9, <3.1.6, <3.2.6
Patches
Vulnerability mechanics
References
1- github.com/onyx-dot-app/onyx/security/advisories/GHSA-rw6w-hp62-gc8wnvdExploitVendor Advisory
News mentions
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