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CVE-2026-55215

CVE-2026-55215 · MariaDB Connector/Node.js: Connector leaks the cleartext password to an MitM despite `ssl: true`

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.5 · High · EPSS 0.6% · Fix available

Published
Updated

Stack: node · database

Affected products and versions

  • mariadb-connector-nodejs

    Versions
    • < 3.2.4: Affected

    No fix published

  • mariadb npm

    Affected ranges
    • SEMVER: < 3.2.4

    Update to 3.2.4

  • mariadb npm

    Affected ranges
    • SEMVER: ≥ 3.3.0, < 3.3.3

    Update to 3.3.3

  • mariadb npm

    Affected ranges
    • SEMVER: ≥ 3.4.0, < 3.4.6

    Update to 3.4.6

  • mariadb npm

    Affected ranges
    • SEMVER: ≥ 3.5.0, < 3.5.3

    Update to 3.5.3

Original sources

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