PT-2026-29279 · Parse Community · Parse Server

Published 2026-03-31 · Updated 2026-03-31 · CVE-2026-34595

NVD

CVSS v4.0

5.3

Medium

AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

CVE-2026-34595

Affected Products

Parse Server

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-34595 · Security Note
• https://github.com/parse-community/parse-server/security/advisories/GHSA-mmg8-87c5-jrc2 · Note
• https://github.com/parse-community/parse-server/pull/10350 · Note
• https://github.com/parse-community/parse-server/pull/10351 · Note
• https://github.com/parse-community/parse-server/commit/ffad0ec6b971ee0dd9545e1bf1fb34ddebf275c2 · Note
• https://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01b0e04759e8c9b98 · Note