CVE-2026-76214

High

Description

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.

SeverityHigh

CVSS7.4

Exploit probability—

ProductPhpmyfaq

PublishedAug 19, 2026

First seenAug 19, 2026

Weakness typeCWE-294CWE-294

How to fix

Update

phpmyfaq phpmyfaq4.1.7 or later

Vendor advisories

github.com/thorsten/phpMyFAQ/security/advisories/GHSA-f534-wv9g-wx2w

Affected products

Product	Affected versions	Fixed in
phpmyfaq phpmyfaq	v < 4.1.7	4.1.7

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