Incorrect authorization in Parse Server - CVE-2026-33421
Published: March 20, 2026
Vulnerability identifier: #VU124160
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33421
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authorization process.
The vulnerability exists due to the LiveQuery WebSocket interface does not enforce Class-Level Permission (CLP) pointer permissions. A remote user can gain access to sensitive information on the system.
Affected software
Parse Server
How to mitigate CVE-2026-33421
Install updates from vendor's website.
Parse Server - addressed in versions 8.6.53, 9.6.0 alpha.42