Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://abraxaslabs.tech/research/PMA-5.2.3-WebAuthn-2FA
- https://abraxaslabs.tech/research/phpmyadmin-webauthn
- https://github.com/phpmyadmin/phpmyadmin
- https://github.com/phpmyadmin/phpmyadmin/blob/RELEASE_5_2_3/libraries/classes/We
- https://www.vulncheck.com/advisories/phpmyadmin-through-5.2.3-webauthn-two-facto
FAQ
What is CVE-2026-119561?
CVE-2026-119561 is a vulnerability with a CVSS score of 6.8 (MEDIUM). phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public ke...
How severe is CVE-2026-119561?
CVE-2026-119561 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-119561?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.