CVE-2026-30947: Parseplatform Parse-Server

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.3 and 8.6.16, class-level permissions (CLP) are not enforced for LiveQuery subscriptions. An unauthenticated or unauthorized client can subscribe to any LiveQuery-enabled class and receive real-time events for all objects, regardless of CLP restrictions. All Parse Server deployments that use LiveQuery with class-level permissions are affected. Data intended to be restricted by CLP is leaked to unauthorized subscribers in real time. This vulnerability is fixed in 9.5.2-alpha.3 and 8.6.16.

Affected products

• Parseplatform Parse-Server: before 8.6.16 (fixed in 8.6.16); from 9.0.0, before 9.5.2 (fixed in 9.5.2); version 9.5.2 only

Published 2026-03-10. Last modified 2026-06-17.