CVE-2026-34532— Parse Server: Cloud function validator bypass via prototype chain traversal
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 8.6.67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。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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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: 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 8.6.67 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: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
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 8.6.67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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| parse-community | parse-server | < 8.6.67 | - |
|
II. Public POCs for CVE-2026-34532
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-34532 (3)
Vendor Advisories for CVE-2026-34532 (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-2026-34595 | Parse Server: LiveQuery protected-field guard bypass via array-like logical operator value | |
| CVE-2026-34784 | Parse Server: Streaming file download bypasses afterFind file trigger authorization | |
| 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
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CVE-2026-66009
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CVE-2026-61448
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CVE-2026-57481
Parse Server: LiveQuery discloses object data to a subscribe
Same vendor: parse-community
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CVE-2026-61448
Parse Server 9.0.0 Stored XSS via malformed Content-Type -
CVE-2026-57481
Parse Server: LiveQuery discloses object data to a subscribe
Same weakness: CWE-863
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