What is CVE-2026-76214?

CVE-2026-76214 is a high-severity vulnerability in Thorsten Phpmyfaq, classified under Authentication Bypass by Capture-replay. CVSS score: 7.4/10. Published 2026-08-19.

How severe is CVE-2026-76214?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Thorsten Phpmyfaq

CVE-2026-76214

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.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Thorsten Phpmyfaq

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-76214?: CVE-2026-76214 is a high-severity vulnerability in Thorsten Phpmyfaq, classified under Authentication Bypass by Capture-replay. CVSS score: 7.4/10. Published 2026-08-19.
How severe is CVE-2026-76214?: High severity. CVSS v3 base score is 7.4 out of 10.