Node.js CVE-2026-33042
MEDIUM
GHSA-wjqw-r9x4-j59v
Lifecycle Timeline
3DescriptionCVE.org
Impact
A user can sign up without providing credentials by sending an empty authData object, bypassing the username and password requirement. This allows the creation of authenticated sessions without proper credentials, even when anonymous users are disabled.
Patches
The fix ensures that empty or non-actionable authData is treated the same as absent authData for the purpose of credential validation on new user creation. Username and password are now required when no valid auth provider data is present.
Workarounds
Use a Cloud Code beforeSave trigger on the _User class to reject signups where authData is empty and no username/password is provided.
AnalysisAI
Node.js authentication bypass allows unauthenticated account creation when empty authData objects bypass credential validation, enabling attackers to establish authenticated sessions without providing required usernames or passwords. This affects applications where anonymous registration is disabled but authentication checks fail to properly validate the authData parameter. The vulnerability is fixed by treating empty authData as absent data and enforcing mandatory credential validation during user registration.
Technical ContextAI
An authentication bypass vulnerability allows attackers to circumvent login mechanisms and gain unauthorized access without valid credentials. This vulnerability is classified as Improper Authentication (CWE-287).
RemediationAI
A vendor patch is available — apply it immediately. Implement robust authentication mechanisms. Use multi-factor authentication. Review authentication logic for bypass conditions. Remove default credentials.
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Same weakness CWE-287 – Improper Authentication
View allSame technique Authentication Bypass
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External POC / Exploit Code
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