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      <title>CVE-2026-53609 — Apostrophe has Server-Side Prototype Pollution in apos.util.set via patch operators that leads to process-wide authoriz…</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-53609</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; apostrophecms apostrophe&lt;/p&gt;
&lt;p&gt;ApostropheCMS is an open-source Node.js content management system. In versions up to and including 4.30.0, `apos.util.set()` traverses dot-notation paths without sanitizing `__proto__`, allowing an authenticated editor to write arbitrary values to `Object.prototype` via the `$pullAll` patch operator. A confirmed gadget in `publicApiCheck()` causes this to bypass authorization on all piece-type REST API endpoints for every subsequent unauthenticated request, for the lifetime of the Node.js process. As of time of publication, no known patched versions are available.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; apostrophecms apostrophe&lt;/p&gt;
&lt;p&gt;ApostropheCMS is an open-source Node.js content management system. In versions up to and including 4.30.0, `apos.util.set()` traverses dot-notation paths without sanitizing `__proto__`, allowing an authenticated editor to write arbitrary values to `Object.prototype` via the `$pullAll` patch operator. A confirmed gadget in `publicApiCheck()` causes this to bypass authorization on all piece-type REST API endpoints for every subsequent unauthenticated request, for the lifetime of the Node.js process. As of time of publication, no known patched versions are available.&lt;/p&gt;</content:encoded>
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