Incorrect authorization in Parse Server - CVE-2026-30229
Published: April 6, 2026
Vulnerability identifier: #VU124970
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-30229
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to obtain full read and write access as any user.
The vulnerability exists due to incorrect authorization in the /loginAs endpoint when handling POST /loginAs requests with readOnlyMasterKey credentials. A remote privileged user can send a crafted request to obtain a valid session token for any user to obtain full read and write access as any user.
Only deployments that use readOnlyMasterKey are vulnerable.
Affected software
Parse Server
How to mitigate CVE-2026-30229
Install security update from vendor's website.
Parse Server - addressed in versions 8.6.6, 9.5.0 alpha.4