Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-34595

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.70 and 9.7.0-alpha.18, an authenticated user with find class-level permission can bypass the protectedFields class-level permission setting on LiveQuery subscriptions. By sending a subscription with a $or, $and, or $nor operator value as a plain object with numeric keys and a length property (an "array-like" object) instead of an array, the protected-field guard is bypassed. The subscription event firing acts as a binary oracle, allowing the attacker to infer whether a protected field matches a given test value. This issue has been patched in versions 8.6.70 and 9.7.0-alpha.18.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 13.9%
CVSS Severity
CVSS v3 Score 4.3
Products affected by CVE-2026-34595


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