MariaDB Corporation MariaDB Connector/R2DBC up to 1.4.0 AuthenticationPlugin Interface missing encryption

Summaryinfo

A vulnerability categorized as problematic has been discovered in MariaDB Corporation MariaDB Connector and R2DBC up to 1.4.0. Affected is an unknown function of the component AuthenticationPlugin Interface. The manipulation results in missing encryption. This vulnerability was named CVE-2026-55860. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in MariaDB Corporation MariaDB Connector and R2DBC up to 1.4.0. It has been classified as problematic. Affected is an unknown functionality of the component AuthenticationPlugin Interface. The manipulation with an unknown input leads to a missing encryption vulnerability. CWE is classifying the issue as CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. This is going to have an impact on confidentiality. CVE summarizes:

MariaDB Connector/R2DBC is a non-blocking MariaDB and MySQL client implemented in Java. Prior to 1.4.1, org.mariadb:r2dbc-mariadb does not gate clear-text password authentication plugins on transport encryption because the AuthenticationPlugin interface has no capability for a plugin to require a secure connection. A hostile or man-in-the-middle MariaDB server can send an AuthSwitchRequest naming mysql_clear_password or dialog (PAM) over a plain-TCP unencrypted connection, and AuthenticationFlow permits ClearPasswordPluginFlow or PamPluginFlow to return the user's password as cleartext bytes on the wire. The disclosed credentials can subsequently be used to authenticate directly to the database server. This issue is fixed in version 1.4.1.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-55860 since 06/17/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600 by the MITRE ATT&CK project.

Upgrading to version 1.4.1 eliminates this vulnerability.

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Productinfo

Type

• Database Software

Vendor

• MariaDB Corporation

Name

• MariaDB Connector
• R2DBC

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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