CVE-2026-44168

A flaw was found in MariaDB. During a State Snapshot Transfer (SST), the donor node improperly validates parameters sent by a joiner node. This vulnerability allows a malicious joiner to execute arbitrary shell commands on the donor server through the mariabackup SST method. This could lead to a complete compromise of the donor system.

This is an Important vulnerability in MariaDB where a malicious joiner can execute arbitrary shell commands on a donor node during a State Snapshot Transfer (SST) due to improper parameter validation. While requiring high privileges and high attack complexity, successful exploitation could lead to a complete compromise of the donor system in MariaDB deployments configured for clustering with SST.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.