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CVE-2026-34532— Parse Server: Cloud function validator bypass via prototype chain traversal

EPSS 0.04% · P13
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I. Basic Information for CVE-2026-34532

Vulnerability Information
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Vulnerability Title
Parse Server: Cloud function validator bypass via prototype chain traversal
Source: NVD (National Vulnerability Database)
Vulnerability Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.67 and 9.7.0-alpha.11, an attacker can bypass Cloud Function validator access controls by appending "prototype.constructor" to the function name in the URL. When a Cloud Function handler is declared using the function keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped. This allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as requireUser, requireMaster, or custom validation logic. This issue has been patched in versions 8.6.67 and 9.7.0-alpha.11.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
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 8.6.67之前版本和9.7.0-alpha.11之前版本存在安全漏洞，该漏洞源于攻击者可通过在URL中追加prototype.constructor绕过云函数验证器访问控制，可能导致未经身份验证的调用者调用受保护的云函数。
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

VendorProductAffected VersionsCPESubscribe
parse-communityparse-server < 8.6.67 -

II. Public POCs for CVE-2026-34532

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III. Intelligence Information for CVE-2026-34532

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

CVE-2026-34373Parse Server: GraphQL API endpoint ignores CORS origin restriction
CVE-2026-34573Parse Server: GraphQL complexity validator exponential fragment traversal DoS
CVE-2026-34224Parse Server: MFA single-use token bypass via concurrent authData login requests
CVE-2026-34595Parse Server: LiveQuery protected-field guard bypass via array-like logical operator value
CVE-2026-34784Parse Server: Streaming file download bypasses afterFind file trigger authorization
CVE-2026-34215Parse Server: Auth data exposed via verify password endpoint
CVE-2026-34574Parse Server: Session field immutability bypass via falsy-value guard
CVE-2026-34363Parse 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-863

V. Comments for CVE-2026-34532

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