CVE-2026-119561

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn…

Phpmyadmin

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

30. Okt 2026

Ausgewertete Quellen

• Hinweis
  https://abraxaslabs.tech/research/PMA-5.2.3-WebAuthn-2FA
• Hinweis
  https://abraxaslabs.tech/research/phpmyadmin-webauthn
• Hinweis
  https://www.vulncheck.com/advisories/phpmyadmin-through-5.2.3-webauthn-two-factor-authentication-bypass-via-customserver
• NVD
  CVE-2026-119561