CVE-2026-76214

Description

phpMyFAQ before 4.1.7 (affected versions <= 4.1.5) fails to persist the WebAuthn login challenge generated by prepareForLogin, because neither WebAuthn controller saves the mutated key objects back to the database. At login the anti-replay comparison is skipped by its own null guard, allowing an attacker who captures a successful WebAuthn assertion to replay it indefinitely and authenticate as the user without any interaction or hardware key.

CVSS Vector

References

• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-f534-wv9g-wx2w
• https://www.vulncheck.com/advisories/phpmyfaq-before-webauthn-replay-attack-via-challenge