CVE-2026-42276— Onyx: IDOR in /chat/stop-chat-session allows any authenticated user to interrupt other users chat sessions
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I. Basic Information for CVE-2026-42276
Vulnerability Information
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Vulnerability Title
Onyx: IDOR in /chat/stop-chat-session allows any authenticated user to interrupt other users chat sessions
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: NVD (National Vulnerability Database)
Vulnerability Title
Onyx 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Onyx是Onyx开源的一个AI大模型平台。 Onyx 3.0.9之前版本、3.1.6之前版本和3.2.6之前版本存在安全漏洞，该漏洞源于POST /chat/stop-chat-session/{chat_session_id}端点检查身份验证但未验证会话属于调用者，可能导致攻击者停止其他用户的活跃聊天会话。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| onyx-dot-app | onyx | < 3.0.9 | - |
II. Public POCs for CVE-2026-42276
| # | POC Description | Source Link | Shenlong Link |
|---|
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