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      <title>CVE-2026-70483 — Open WebUI: Any authenticated user can cancel another user's chat generation via the chat delete endpoint</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-70483</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; open-webui&lt;/p&gt;
&lt;p&gt;Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, DELETE /api/v1/chats/{id} cancelled a chat&amp;#39;s in-flight tasks before checking whether the caller could delete that chat. Any authenticated user who knew another user&amp;#39;s chat id could abort that user&amp;#39;s running model response, title generation, or tag generation, even though the delete was refused and no chat data was deleted, modified, or disclosed. This issue is fixed in 0.11.0.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; open-webui&lt;/p&gt;
&lt;p&gt;Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, DELETE /api/v1/chats/{id} cancelled a chat&amp;#39;s in-flight tasks before checking whether the caller could delete that chat. Any authenticated user who knew another user&amp;#39;s chat id could abort that user&amp;#39;s running model response, title generation, or tag generation, even though the delete was refused and no chat data was deleted, modified, or disclosed. This issue is fixed in 0.11.0.&lt;/p&gt;</content:encoded>
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