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

Quick assessment

Affected
parse-community parse-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Parse Server是Parse Platform开源的一个开源后端，可以部署到任何可以运行 Node.js 的基础设施。 Parse Server 8.6.70之前版本和9.7.0-alpha.18之前版本存在安全漏洞，该漏洞源于具有查找类级别权限的经过身份验证的用户可能绕过LiveQuery订阅中的受保护字段权限设置。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.25% · P17
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I. Basic Information for CVE-2026-34595

Vulnerability Information
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Vulnerability Title
Parse Server: LiveQuery protected-field guard bypass via array-like logical operator value
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
Source: CVE Program / CVE List V5
Vulnerability Title
Parse Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Parse Server是Parse Platform开源的一个开源后端，可以部署到任何可以运行 Node.js 的基础设施。 Parse Server 8.6.70之前版本和9.7.0-alpha.18之前版本存在安全漏洞，该漏洞源于具有查找类级别权限的经过身份验证的用户可能绕过LiveQuery订阅中的受保护字段权限设置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
parse-community parse-server < 8.6.70 -

II. Public POCs for CVE-2026-34595

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III. Intelligence Information for CVE-2026-34595

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Patches & Fixes for CVE-2026-34595 (4)

Vendor Advisories for CVE-2026-34595 (1)

Same Patch Batch · parse-community · 2026-03-31 · 9 CVEs total

CVE-2026-34373 Parse Server: GraphQL API endpoint ignores CORS origin restriction
CVE-2026-34573 Parse Server: GraphQL complexity validator exponential fragment traversal DoS
CVE-2026-34224 Parse Server: MFA single-use token bypass via concurrent authData login requests
CVE-2026-34784 Parse Server: Streaming file download bypasses afterFind file trigger authorization
CVE-2026-34532 Parse Server: Cloud function validator bypass via prototype chain traversal
CVE-2026-34215 Parse Server: Auth data exposed via verify password endpoint
CVE-2026-34574 Parse Server: Session field immutability bypass via falsy-value guard
CVE-2026-34363 Parse Server: LiveQuery protected field leak via shared mutable state across concurrent su

IV. Related Vulnerabilities

Same product: parse-server
Same vendor: parse-community
Same weakness: CWE-843

V. Comments for CVE-2026-34595

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