MariaDB Corporation MariaDB Connector Node.js prior 3.3.3/3.4.6/3.5.3 Handshake Authentication handshake.js certificate validation

Summaryinfo

A vulnerability described as problematic has been identified in MariaDB Corporation MariaDB Connector Node.js. This impacts an unknown function of the file lib/cmd/handshake/auth/handshake.js of the component Handshake Authentication. Executing a manipulation can lead to certificate validation. This vulnerability is handled as CVE-2026-55215. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic was found in MariaDB Corporation MariaDB Connector Node.js. This vulnerability affects an unknown code block of the file lib/cmd/handshake/auth/handshake.js of the component Handshake Authentication. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect integrity. CVE summarizes:

MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to versions 3.3.3, 3.4.6, and 3.5.3, when ssl is enabled without a pinned CA or server certificate, MariaDB Connector/Node.js sends credentials before completing certificate fingerprint validation. In lib/cmd/handshake/auth/handshake.js, a server that selects mysql_clear_password as the initial authentication plugin can receive the password before the post-TLS identity check. In lib/cmd/handshake/authentication.js, an authentication switch can evaluate the previous plugin instead of the requested target plugin, allowing mysql_clear_password to send the credential first. An active man-in-the-middle can present a self-signed certificate, capture the database password, and use it to authenticate directly even though the connector later rejects the server and closes the connection. This issue is fixed in versions 3.3.3, 3.4.6, and 3.5.3.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-55215 since 06/16/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1587.003.

Upgrading to version 3.3.3, 3.4.6 or 3.5.3 eliminates this vulnerability.

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Productinfo

Type

• JavaScript Library

Vendor

• MariaDB Corporation

Name

• MariaDB Connector Node.js

License

• open-source

CPE 2.3info

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CPE 2.2info

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