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 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.

Score
CVSS 3.1 9.1 Critical
Status
Deferred - security-advisories@github.com
Published
2026-06-12
Last modified
2026-10-25
Weaknesses
CWE-1321

Affected products

References

 
 
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