CVE-2026-33527: Parseplatform Parse-Server

Medium severity, CVSS 4.3. EPSS: 0.3% 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 versions 8.6.57 and 9.6.0-alpha.48, an authenticated user can overwrite server-generated session fields such as expiresAt and createdWith when updating their own session via the REST API. This allows bypassing the server's configured session lifetime policy, making a session effectively permanent. This issue has been patched in versions 8.6.57 and 9.6.0-alpha.48.

Affected products

• Parseplatform Parse-Server: before 8.6.57 (fixed in 8.6.57); from 9.0.0, before 9.6.0 (fixed in 9.6.0); version 9.6.0 only

Published 2026-03-24. Last modified 2026-06-17.