CVE-2026-34595
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
In Parse Server before versions 8.6.70 and 9.7.0-alpha.18, an authenticated user with find class-level permission can bypass the protectedFields setting on LiveQuery subscriptions. By sending a subscription with $or, $and, or $nor as an array-like object, the protection is bypassed, allowing reading of protected fields.
Risk Assessment
An attacker can read protected data fields, compromising information confidentiality.
Recommendation
Update Parse Server to version 8.6.70 or 9.7.0-alpha.18.
Original NVD description (English source)
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.