CVE-2026-53609
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
12/06/2026
Last modified:
12/06/2026
Description
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.
Impact
Base Score 3.x
9.10
Severity 3.x
CRITICAL