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      <title>CVE-2026-42276 — Onyx: IDOR in /chat/stop-chat-session allows any authenticated user to interrupt other users chat sessions</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-42276</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; onyx-dot-app onyx&lt;/p&gt;
&lt;p&gt;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&amp;#39;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&amp;#39;s LLM generation mid-stream. This issue has been patched in versions 3.0.9, 3.1.6, and 3.2.6.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; onyx-dot-app onyx&lt;/p&gt;
&lt;p&gt;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&amp;#39;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&amp;#39;s LLM generation mid-stream. This issue has been patched in versions 3.0.9, 3.1.6, and 3.2.6.&lt;/p&gt;</content:encoded>
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