Auth bypass in Phpmyfaq
CVE-2026-27836
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…
Vulnerability class: Broken Access Control
EPSS: 0.004 (33.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Phpmyfaq
- Thorsten Phpmyfaq — versions < 4.0.18
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-27836?
- CVE-2026-27836 is a high-severity vulnerability in Phpmyfaq, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-02-27.
- How severe is CVE-2026-27836?
- High severity. CVSS v3 base score is 7.5 out of 10.