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CVE-2026-34784— Parse Server: Streaming file download bypasses afterFind file trigger authorization

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 8.6.71之前版本和9.7.1-alpha.1之前版本存在授权问题漏洞，该漏洞源于HTTP Range请求绕过afterFind触发器验证，可能导致未经授权的文件访问。

AI Predicted 8.6 Difficulty: Easy EPSS 0.38% · P31

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-34784

Vulnerability Information
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Vulnerability Title
Parse Server: Streaming file download bypasses afterFind file trigger authorization
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 8.6.71 and 9.7.1-alpha.1, file downloads via HTTP Range requests bypass the afterFind(Parse.File) trigger and its validators on storage adapters that support streaming (e.g. the default GridFS adapter). This allows access to files that should be protected by afterFind trigger authorization logic or built-in validators such as requireUser. This issue has been patched in versions 8.6.71 and 9.7.1-alpha.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Parse Server 授权问题漏洞
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 8.6.71之前版本和9.7.1-alpha.1之前版本存在授权问题漏洞，该漏洞源于HTTP Range请求绕过afterFind触发器验证，可能导致未经授权的文件访问。
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 < 8.6.71 -

II. Public POCs for CVE-2026-34784

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III. Intelligence Information for CVE-2026-34784

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Patches & Fixes for CVE-2026-34784 (2)

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-2026-34532 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-285

V. Comments for CVE-2026-34784

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