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CVE-2026-32242— Parse Server OAuth2 adapter shares mutable state across providers via singleton instance

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 9.6.0-alpha.11之前版本和8.6.37之前版本存在竞争条件问题漏洞，该漏洞源于内置OAuth2身份验证适配器重用单例实例，可能导致跨提供程序的令牌验证错误。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.38% · P30

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-32242

Vulnerability Information
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Vulnerability Title
Parse Server OAuth2 adapter shares mutable state across providers via singleton instance
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 9.6.0-alpha.11 and 8.6.37, Parse Server's built-in OAuth2 auth adapter exports a singleton instance that is reused directly across all OAuth2 provider configurations. Under concurrent authentication requests for different OAuth2 providers, one provider's token validation may execute using another provider's configuration, potentially allowing a token that should be rejected by one provider to be accepted because it is validated against a different provider's policy. Deployments that configure multiple OAuth2 providers via the oauth2: true flag are affected. This vulnerability is fixed in 9.6.0-alpha.11 and 8.6.37.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/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
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Parse Server 竞争条件问题漏洞
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 9.6.0-alpha.11之前版本和8.6.37之前版本存在竞争条件问题漏洞，该漏洞源于内置OAuth2身份验证适配器重用单例实例，可能导致跨提供程序的令牌验证错误。
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 >= 9.0.0 < 9.6.0-alpha.11 -

II. Public POCs for CVE-2026-32242

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III. Intelligence Information for CVE-2026-32242

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Vendor Advisories for CVE-2026-32242 (1)

Vendor Pages for CVE-2026-32242 (1)

Other References for CVE-2026-32242 (1)

Same Patch Batch · parse-community · 2026-03-12 · 3 CVEs total

CVE-2026-32248 Parse Server: Account takeover via operator injection in authentication data identifier
CVE-2026-32269 Parse Server OAuth2 adapter app ID validation sends wrong token to introspection endpoint

IV. Related Vulnerabilities

Same product: parse-server
Same vendor: parse-community
Same weakness: CWE-362

V. Comments for CVE-2026-32242

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