Improper Authentication in Parse Server - CVE-2026-33409
Published: March 20, 2026
Vulnerability identifier: #VU124161
CSH Severity: Low
CVSS v4: 7 [CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33409
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass authentication process.
The vulnerability exists due to improper authentication when the server option "allowExpiredAuthDataToken" is set to true. A remote administrator can bypass authentication process and gain unauthorized access to the application.
Affected software
Parse Server
How to mitigate CVE-2026-33409
Install updates from vendor's website.
Parse Server - addressed in versions 8.6.52, 9.6.0 alpha.41