CVE-2026-76214
9.1
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| thorsten | phpMyFAQ | 0 < 4.1.7 | affected |
| thorsten | phpMyFAQ | 4.1.7 | unaffected |
Weaknesses
- CWE-294: Authentication Bypass by Capture-replay
References
- https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-f534-wv9g-wx2w
- https://www.vulncheck.com/advisories/phpmyfaq-before-webauthn-replay-attack-via-challenge
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