Phpmyfaq · Phpmyfaq · CVE-2026-27836
**Name of the Vulnerable Software and Affected Versions**
phpMyFAQ versions prior to 4.0.18
**Description**
The WebAuthn prepare endpoint, `/api/webauthn/prepare`, in versions prior to 4.0.18 lacks authentication, CSRF protection, captcha, or configuration checks. This allows unauthenticated attackers to create an unlimited number of user accounts, even when registration is disabled. The vulnerable parameter is not specified.
**Recommendations**
Update to version 4.0.18 or later.