CVE-2026-53609
CRITICAL EPSS 14.6%
Published Jun 12, 20262w ago · Modified Jun 17, 20262w ago
9.1 CVSS 3.1
Published Jun 12, 2026 2w ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity Low
Availability Low
Threat Intelligence
EPSS Exploit Probability
14.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-1321
References 1
- github.com https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-6h5j-32cf-4253
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.