๐Ÿ›ก๏ธ CVE-2026-42276
๐ŸŸก CVSS 4.3 โ€” Medium โš ๏ธ Exploit Public CWE-639 NVD
4.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 4.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE CWE-639
Public Exploit โš ๏ธ Yes
Source NVD
Published 2026-05-08
Updated 2026-06-02
Modified 2026-05-12
Fix URL N/A

Affected Packages

Software From version Fixed in
onyx 3.2.0 3.2.6
unknown โ€” โ€”

Similar Threats

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