CVE-2026-76214
phpMyFAQ before 4.1.7 WebAuthn Replay Attack via Challenge
CVSS Score
7.4
EPSS Score
0.3%
EPSS Percentile
22th
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.
| CWE | CWE-294 |
| Vendor | thorsten |
| Product | phpmyfaq |
| Published | Aug 19, 2026 |
| Last Updated | Aug 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
thorsten / phpMyFAQ
0 < 4.1.7
References
Credits
🔍 arpitjain099