UBUNTU-CVE-2026-119561

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    UBUNTU-CVE-2026-119561

    Published: 30 Oct 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-119561

    Summary:

    Details: 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.

    References: https://ubuntu.com/security/CVE-2026-119561, https://www.cve.org/CVERecord?id=CVE-2026-119561, 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/WebAuthn/CustomServer.php#L76-L110, https://www.vulncheck.com/advisories/phpmyadmin-through-5.2.3-webauthn-two-factor-authentication-bypass-via-customserver

    Affected packages

    Package

    Name: phpmyadmin

    Purl: pkg:deb/ubuntu/phpmyadmin?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4:4.0.6-1
    4:4.0.8-1
    4:4.0.9-1
    4:4.0.10-1
    4:4.0.10-1ubuntu0.1
    4:4.0.10-1ubuntu0.1+esm1
    4:4.0.10-1ubuntu0.1+esm2
    4:4.0.10-1ubuntu0.1+esm3
    4:4.0.10-1ubuntu0.1+esm4

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2026-119561 | CVE-DB