Incorrect authorization in Parse Server - CVE-2026-33527
Published: April 6, 2026
Vulnerability identifier: #VU125008
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33527
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass the server's configured session lifetime policy.
The vulnerability exists due to incorrect authorization in the session update endpoint when handling REST API requests to update a user's own session. A remote user can overwrite server-generated session fields such as expiresAt and createdWith to bypass the server's configured session lifetime policy.
Affected software
Parse Server
How to mitigate CVE-2026-33527
Install security update from vendor's website.
Parse Server - addressed in versions 8.6.57, 9.6.0 alpha.48