CVE-2026-44168
HighCVSS 8.0Exploitation Probability (EPSS)
Low risk43th percentile - higher than 43% of all known CVEs
Summary
A vulnerability in MariaDB allows a malicious joiner node to execute arbitrary shell commands on the donor node during the SST (State Snapshot Transfer) process using the mariabackup method. The issue is caused by insufficient validation of parameters sent by the joiner, which are interpolated into the donor's command line.
Risk Assessment
An attacker can take over the donor node of a MariaDB cluster, leading to compromise of data confidentiality, integrity, and availability, as well as potential lateral movement within the infrastructure.
Recommendation
Immediately upgrade MariaDB to versions 10.6.26, 10.11.17, 11.4.11, 11.8.7, or 12.3.2 depending on your branch. Restrict trust between cluster nodes and apply network segmentation.
Original NVD description (English source)
MariaDB server is a community developed fork of MySQL server. From versions 10.6.1 to before 10.6.26, 10.11.1 to before 10.11.17, 11.4.1 to before 11.4.11, 11.8.1 to before 11.8.7, and 12.3.1, during the SST the donor node is interpolating parameters that the joiner sent into the command line. Not all parameters were properly validated which could allow a malicious joiner to execute arbitrary shell commands on the donor side via the mariabackup SST method. This issue has been patched in versions 10.6.26, 10.11.17, 11.4.11, 11.8.7, and 12.3.2.