Improper Authentication in Parse Server - CVE-2026-30863
Published: April 6, 2026
Vulnerability identifier: #VU124972
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-30863
CWE-ID: CWE-287
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 attacker to authenticate as any user on the target Parse Server.
The vulnerability exists due to improper authentication in the Google, Apple, and Facebook authentication adapters when verifying identity tokens without audience claim validation. A remote attacker can present a validly signed JWT issued for a different application to authenticate as any user on the target Parse Server.
For Google and Apple, exploitation is possible when the server does not configure clientId. For Facebook Limited Login, the JWT verification path does not validate appIds as the audience.
How to mitigate CVE-2026-30863
Install security update from vendor's website.