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      <title>CVE-2026-42885 — Audiobookshelf: Path prefix bypass in filesystem existence check leaks out-of-scope file existence</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-42885</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; advplyr audiobookshelf&lt;/p&gt;
&lt;p&gt;Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the POST /api/filesystem/pathexists endpoint uses String.startsWith() to validate that a resolved file path is within a library folder. This check fails for sibling directories whose names share a common prefix (e.g., /audiobooks vs /audiobooks-private), allowing authenticated users with upload permission to probe file existence outside their authorized library folder boundaries. This vulnerability is fixed in 2.32.2.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; advplyr audiobookshelf&lt;/p&gt;
&lt;p&gt;Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the POST /api/filesystem/pathexists endpoint uses String.startsWith() to validate that a resolved file path is within a library folder. This check fails for sibling directories whose names share a common prefix (e.g., /audiobooks vs /audiobooks-private), allowing authenticated users with upload permission to probe file existence outside their authorized library folder boundaries. This vulnerability is fixed in 2.32.2.&lt;/p&gt;</content:encoded>
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