CVE-2026-48163
HighCVSS 8.0Exploitation Probability (EPSS)
Low risk47th percentile - higher than 47% 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 rsync method. The issue stems from insufficient validation of parameters sent by the joiner, which are interpolated into the command line on the donor side.
Risk Assessment
An attacker can take control of the donor node, compromising the confidentiality, integrity, and availability of data in the MariaDB cluster, and potentially escalate the attack to other systems on the network.
Recommendation
Immediately upgrade MariaDB to versions 10.6.27, 10.11.18, 11.4.12, 11.8.8, or 12.3.2 depending on the branch used. Until the update is applied, restrict trust to joining nodes or disable the rsync SST method.
Original NVD description (English source)
MariaDB server is a community developed fork of MySQL server. From versions 10.6.1 to before 10.6.27, 10.11.1 to before 10.11.18, 11.4.1 to before 11.4.12, 11.8.1 to before 11.8.8, 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 rsync SST method. This issue has been patched in versions 10.6.27, 10.11.18, 11.4.12, 11.8.8, and 12.3.2.