Time-of-check Time-of-use (TOCTOU) Race Condition in Parse Server - CVE-2026-34224
Published: March 30, 2026
Vulnerability identifier: #VU124685
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-34224
CWE-ID: CWE-367
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 compromise the target system.
The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition. A remote administrator can send concurrent login requests via the authData login endpoint and create multiple authenticated sessions.
How to mitigate CVE-2026-34224
Install updates from vendor's website.