Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-33538

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 31.3%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-33538


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