Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Phpmyfaq | Phpmyfaq | < 4.1.7 |
Related Weaknesses (CWE)
References
- https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-f534-wv9g-wx2wMitigationVendor Advisory
- https://www.vulncheck.com/advisories/phpmyfaq-before-webauthn-replay-attack-via-Third Party Advisory
FAQ
What is CVE-2026-76214?
CVE-2026-76214 is a vulnerability with a CVSS score of 7.4 (HIGH). 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 a...
How severe is CVE-2026-76214?
CVE-2026-76214 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-76214?
Check the references section above for vendor advisories and patch information. Affected products include: Phpmyfaq Phpmyfaq.