CVE-2026-76214: phpmyfaq phpmyfaq

CVSS 9.1 (critical) · published 2026-08-19

phpMyFAQ before 4.1.7 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.

Affected products (NVD): phpmyfaq phpmyfaq

Fixed in (NVD): 4.1.7

Weakness: CWE-294

Source: NVD CVE-2026-76214

References

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

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