SB2026040748 - Uncontrolled Recursion in Parse Server
Published: April 7, 2026
Security Bulletin ID
SB2026040748
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Uncontrolled Recursion (CVE-ID: CVE-2026-33508)
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in the LiveQuery subscription handler when processing WebSocket subscription requests with deeply nested logical operators. A remote attacker can send a specially crafted subscription request to cause a denial of service.
Deployments are affected when the LiveQuery WebSocket endpoint is reachable by untrusted clients.
Remediation
Install update from vendor's website.