CVE-2026-33042

Description

### 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.

How to fix CVE-2026-33042

To remediate CVE-2026-33042, upgrade the affected package to a fixed version below.

• —upgrade to 8.6.49 or later
• —upgrade to 9.6.0-alpha.29 or later

Is CVE-2026-33042 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 8.6.49, >= 9.0.0, < 9.6.0
• >= 9.0.0, < 9.6.0-alpha.29

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-33042
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/pull/10219
• WEBgithub.com/parse-community/parse-server/pull/10220