SB2026040788 - Insufficient verification of data authenticity in Parse Server
Published: April 7, 2026
Security Bulletin ID
SB2026040788
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Insufficient verification of data authenticity (CVE-ID: CVE-2026-27804)
The vulnerability allows a remote attacker to log in as any user linked to a Google account.
The vulnerability exists due to insufficient verification of data authenticity in the Google auth adapter when processing forged Google authentication tokens. A remote attacker can forge a token with alg set to none to log in as any user linked to a Google account.
Only deployments with Google authentication enabled are vulnerable.
Remediation
Install update from vendor's website.