CVE-2026-55860: org.mariadb:r2dbc-mariadb vulnerable to cleartext password disclosure to a man-in-the-middle server (clear-text auth plugins not gated on a secure transport)
The connector does not gate clear-text password authentication plugins on transport encryption. A hostile or man-in-the-middle MariaDB server can request a clear-text plugin over an unencrypted (plain-TCP) connection, and the driver responds with the user’s password in cleartext on the wire.
References
- github.com/advisories/GHSA-c857-9x2m-cvh2
- github.com/mariadb-corporation/mariadb-connector-r2dbc/commit/be786603ec5530414996d2396157013e095b320a
- github.com/mariadb-corporation/mariadb-connector-r2dbc/releases/tag/1.4.1
- github.com/mariadb-corporation/mariadb-connector-r2dbc/security/advisories/GHSA-c857-9x2m-cvh2
- hackerone.com/reports/3784556
- jira.mariadb.org/browse/R2DBC-115
- nvd.nist.gov/vuln/detail/CVE-2026-55860
Code Behaviors & Features
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