CVE-2026-34595

UNKNOWN 0.0

Parse Server: LiveQuery protected-field guard bypass via array-like logical operator value

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-843
Vendor	parse-community
Product	parse-server
Published	Mar 31, 2026
Last Updated	Mar 31, 2026

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Affected Versions

parse-community / parse-server

< 8.6.70 >= 9.0.0, < 9.7.0-alpha.18

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/parse-community/parse-server/security/advisories/GHSA-mmg8-87c5-jrc2 github.com: https://github.com/parse-community/parse-server/pull/10350 github.com: https://github.com/parse-community/parse-server/pull/10351 github.com: https://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01b0e04759e8c9b98 github.com: https://github.com/parse-community/parse-server/commit/ffad0ec6b971ee0dd9545e1bf1fb34ddebf275c2