CVE-2026-27836
phpMyFAQ Allows Unauthenticated Account Creation via WebAuthn Prepare Endpoint
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
phpMyFAQ is an open source FAQ web application. Prior to version 4.0.18, the WebAuthn prepare endpoint (`/api/webauthn/prepare`) creates new active user accounts without any authentication, CSRF protection, captcha, or configuration checks. This allows unauthenticated attackers to create unlimited user accounts even when registration is disabled. Version 4.0.18 fixes the issue.
| CWE | CWE-862 |
| Vendor | thorsten |
| Product | phpmyfaq |
| Published | Feb 27, 2026 |
| Last Updated | Mar 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
thorsten / phpMyFAQ
< 4.0.18