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      <title>CVE-2026-52850 — Docmost: Broken access control in transclusion lookup API leaks sync-block content across private spaces</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-52850</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; docmost&lt;/p&gt;
&lt;p&gt;Docmost is open-source collaborative wiki and documentation software. Prior to 0.90.1, an authenticated workspace member who does not belong to a private space can call the transclusion / sync-block lookup API with a known sourcePageId and transclusionId pair because the lookup does not enforce private space membership before resolving the source page. The API can return confidential sync-block content and source page metadata even though the normal page APIs deny access to the same page. This issue is fixed in version 0.90.1.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; docmost&lt;/p&gt;
&lt;p&gt;Docmost is open-source collaborative wiki and documentation software. Prior to 0.90.1, an authenticated workspace member who does not belong to a private space can call the transclusion / sync-block lookup API with a known sourcePageId and transclusionId pair because the lookup does not enforce private space membership before resolving the source page. The API can return confidential sync-block content and source page metadata even though the normal page APIs deny access to the same page. This issue is fixed in version 0.90.1.&lt;/p&gt;</content:encoded>
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