Incorrect authorization in Parse Server - CVE-2026-30229
Published: April 6, 2026
Vulnerability identifier: #VU124970
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-30229
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Parse Community
Affected software:
Parse Server
Parse Server
Detailed vulnerability description
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.
How to mitigate CVE-2026-30229
Install security update from vendor's website.