Race condition in Parse Server - CVE-2026-32242
Published: April 6, 2026
Vulnerability identifier: #VU125001
CSH Severity: Medium
CVSS v4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-32242
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass OAuth2 token validation and gain unauthorized access.
The vulnerability exists due to a race condition in the built-in OAuth2 auth adapter when handling concurrent authentication requests for different OAuth2 providers. A remote attacker can send concurrent authentication requests to cause one provider's token validation to use another provider's configuration to bypass OAuth2 token validation and gain unauthorized access.
Only deployments that configure multiple OAuth2 providers via the oauth2: true flag are vulnerable.
Affected software
Parse Server
How to mitigate CVE-2026-32242
Install security update from vendor's website.
Parse Server - addressed in versions 8.6.37, 9.6.0 alpha.11