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      <title>CVE-2026-54069 — SiYuan: Unauthenticated Admin API Access via Blanket chrome-extension:// Origin Allowlist</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-54069</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; siyuan-note siyuan&lt;/p&gt;
&lt;p&gt;SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan Note&amp;#39;s kernel HTTP server unconditionally trusts all chrome-extension:// origins, granting RoleAdministrator access to every installed browser extension without any authentication. Combined with the default empty AccessAuthCode on desktop installs, any Chrome/Chromium extension -- including a compromised legitimate extension via supply chain attack -- can make fully authenticated admin API calls to the SiYuan kernel at 127.0.0.1:6806, enabling data exfiltration, stored XSS injection, and configuration tampering. This vulnerability is fixed in 3.7.0.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; siyuan-note siyuan&lt;/p&gt;
&lt;p&gt;SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan Note&amp;#39;s kernel HTTP server unconditionally trusts all chrome-extension:// origins, granting RoleAdministrator access to every installed browser extension without any authentication. Combined with the default empty AccessAuthCode on desktop installs, any Chrome/Chromium extension -- including a compromised legitimate extension via supply chain attack -- can make fully authenticated admin API calls to the SiYuan kernel at 127.0.0.1:6806, enabling data exfiltration, stored XSS injection, and configuration tampering. This vulnerability is fixed in 3.7.0.&lt;/p&gt;</content:encoded>
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