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CVE-2026-34595

CVE-2026-34595 · Parse Server: LiveQuery protected-field guard bypass via array-like logical operator value

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.3 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • parse-server

    Versions
    • < 8.6.70: Affected
    • >= 9.0.0, < 9.7.0-alpha.18: Affected

    No fix published

  • parse-server npm

    Affected ranges
    • SEMVER: ≥ 9.0.0, < 9.7.0-alpha.16

    Update to 9.7.0-alpha.16

  • parse-server npm

    Affected ranges
    • SEMVER: < 8.6.70

    Update to 8.6.70

Original sources

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