CVE-2026-76214
phpMyFAQ before 4.1.7 WebAuthn Replay Attack via Challenge
CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-294 |
| Vendor | thorsten |
| Product | phpmyfaq |
| Published | Aug 19, 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