CVE-2026-53609

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 confirm...

CVE-2026-53609 Apostrophe has Server-Side Prototype Pollution in apos.util.set via patch operators that leads to process-wide authorization bypass

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 confirm...

PT-2026-49006

Name of the Vulnerable Software and Affected Versions ApostropheCMS versions prior to 4.30.1 Description A prototype pollution issue exists in the apos.util.set function, which traverses dot-notation paths without sanitizing the proto property. This allows an authenticated editor to write arbitra...