CVE-2026-76214

Summary

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.

Affected Software

VendorProductVersion RangeStatus
thorstenphpMyFAQ0 < 4.1.7affected
thorstenphpMyFAQ4.1.7unaffected

Weaknesses

  • CWE-294: Authentication Bypass by Capture-replay

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References