Bug 2563944 (CVE-2026-119561) - CVE-2026-119561 phpMyAdmin: phpMyAdmin: Two-factor authentication bypass via unverified WebAuthn signatures
Summary: CVE-2026-119561 phpMyAdmin: phpMyAdmin: Two-factor authentication bypass via ...
Keywords:
Status: NEW
Alias: CVE-2026-119561
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2565553 2565555 2565556 2565557 2565558
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-30 11:52 UTC by OSIDB Bzimport
Modified: 2026-11-03 02:49 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-10-30 11:52:30 UTC 
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.
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