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CVE-2026-42276

Onyx: IDOR in /chat/stop-chat-session allows any authenticated user to interrupt other users chat sessions PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
onyx-dot-app / onyxaffected < 3.0.9; affected >= 3.1.0, < 3.1.6; affected >= 3.2.0, < 3.2.6

CWE

CWE-639

References

ADP enrichment

CISA-ADP

No English description supplied.