cvedb.io
CVE-2026-53609
CRITICAL · CVSS 9.1
EPSS exploitation probability: 0%
Published 2026-06-12T22:16:52.803 · Last modified 2026-06-17T10:57:58.447

Summary

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.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.