CVE-2026-111911 phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection
Attackers can bypass authentication in phpMyFAQ by injecting WebAuthn credentials, leading to full account takeover without valid passwords or TOTP.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111911?
CVE-2026-111911 is a critical authentication bypass vulnerability in thorsten phpMyFAQ, published on 17 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-287
Which versions are affected by CVE-2026-111911?
How do I fix CVE-2026-111911?
No fix has been published for CVE-2026-111911 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-111911 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111911 exists.
Sources
Also known as GHSA-768h-xwv2-fwp3.