CVE-2026-55856: Mariadb Handshake Unvalidated Auth Response

Database credentials may be sent in the initial handshake response before validating authentication plugin security requirements and MitM resistance, potentially exposing plaintext credentials to a rogue server or MitM attacker.

Provally CuratedPublic repositoryMediumMedium confidenceVerifiedApache-2.0Java
greprules fetch cve-2026-55856-mariadb-handshake-unvalidated-auth-response --engine opengrep

Description

Database credentials may be sent in the initial handshake response before validating authentication plugin security requirements and MitM resistance, potentially exposing plaintext credentials to a rogue server or MitM attacker.