VULNERABILITY INTELLIGENCE

CVE-2026-27836

CVSS score7.5 HIGH
EPSS probability0.45%
CISA KEVNot currently listed
Published2026-02-27
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-862

Primary references