CVE-2026-119561

Medium

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.

SeverityMedium

CVSS6.8

Exploit probability10. percentile0.2%

Product

Phpmyadmin

PublishedOct 30, 2026

First seenNov 4, 2026

Weakness typeCWE-347CWE-347

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

Product	Affected versions	Fixed in
phpmyadmin phpmyadmin	v ≤ 5.2.3	—

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