Node.js CVE-2026-30967
HIGH
GHSA-fr88-w35c-r596
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub Advisory
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.9. and 8.6.22, the OAuth2 authentication adapter, when configured without the useridField option, only verifies that a token is active via the provider's token introspection endpoint, but does not verify that the token belongs to the user identified by authData.id. An attacker with any valid OAuth2 token from the same provider can authenticate as any other user. This affects any Parse Server deployment that uses the generic OAuth2 authentication adapter (configured with oauth2: true) without setting the useridField option. This vulnerability is fixed in 9.5.2-alpha.9. and 8.6.22.
AnalysisAI
Parse Server versions prior to 9.5.2-alpha.9 and 8.6.22 fail to properly validate OAuth2 token ownership when the useridField option is not configured, allowing attackers with any valid token from the same provider to impersonate arbitrary users. This authentication bypass affects all Parse Server deployments using the generic OAuth2 adapter without the useridField setting. The vulnerability is resolved in patched versions 9.5.2-alpha.9 and 8.6.22.
Technical ContextAI
Classified as CWE-287 (Improper Authentication). Affects Parse-Server. Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.9. and 8.6.22, the OAuth2 authentication adapter, when configured without the useridField option, only verifies that a token is active via the provider's token introspection endpoint, but does not verify that the token belongs to the user identified by authData.id. An attacker with any valid OAuth2 token from the same provider can authenticate as any other user. This affec
RemediationAI
A vendor patch is available — apply it immediately. Fixed in version 9.5.2. Restrict network access to the affected service where possible.
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Same weakness CWE-287 – Improper Authentication
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External POC / Exploit Code
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