SB2026040778 - Inefficient regular expression complexity in Parse Server
Published: April 7, 2026
Security Bulletin ID
SB2026040778
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) Inefficient regular expression complexity (CVE-ID: CVE-2026-30925)
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inefficient regular expression complexity in LiveQuery subscription matching when processing a crafted $regex query. A remote attacker can subscribe to a LiveQuery with a crafted regular expression pattern to cause a denial of service.
Only deployments with LiveQuery enabled are vulnerable. Normal REST and GraphQL queries are not affected because their regular expressions are evaluated by the database engine.
Remediation
Install update from vendor's website.