CVE-2026-111911
phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
phpMyFAQ 4.0.0 before 4.1.9 contains an authentication bypass vulnerability where WebAuthn registration endpoints attach credentials to any account without authentication or challenge validation. Attackers can stage a victim username, submit a forged fmt=none attestation to register a passkey, then log in bypassing passwords and TOTP for account takeover.
| CWE | CWE-287 |
| Vendor | thorsten |
| Product | phpmyfaq |
| Published | Oct 17, 2026 |
Stay Ahead of the Next One
Get instant alerts for thorsten phpmyfaq
Be the first to know when new critical vulnerabilities affecting thorsten phpmyfaq are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
thorsten / phpMyFAQ
4.0.0 < 4.1.9
References
github.com: https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-g6cq-6rqg-6c9p github.com: https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-rg9h-f29v-xhxr vulncheck.com: https://www.vulncheck.com/advisories/phpmyfaq-4.0.0-before-4.1.9-authentication-bypass-via-webauthn-credential-injection
Credits
🔍 HieuDC-SAS-NightWolf