CVE-2026-33042
EPSS 0.01%Parse Server affected by empty authData bypassing credential requirement on signup
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.
Affected packages (2)
- Bitnami/parsefrom 0, < 8.6.49, >= 9.0.0, < 9.6.0
- npm/parse-server>= 9.0.0, < 9.6.0-alpha.29
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-33042
- PATCHhttps://github.com/parse-community/parse-server
- WEBhttps://github.com/parse-community/parse-server/pull/10219
- WEBhttps://github.com/parse-community/parse-server/pull/10220
- WEBhttps://github.com/parse-community/parse-server/security/advisories/GHSA-wjqw-r9x4-j59v