Mariadb SST Shell Exec via rsync before 10.6.27,10.11.18,11.4.12,11.8.8,12.3.2
CVE-2026-48163 Published on June 12, 2026
MariaDB: wsrep SST unsafe parameter handling on the donor side (rsync)
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.
Vulnerability Analysis
CVE-2026-48163 can be exploited with network access, and requires user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2026-48163 has been classified to as a Shell injection vulnerability or weakness.
Affected Versions
MariaDB server:- Version >= 10.6.1, < 10.6.27 is affected.
- Version >= 10.11.1, < 10.11.18 is affected.
- Version >= 11.4.1, < 11.4.12 is affected.
- Version >= 11.8.1, < 11.8.8 is affected.
- Version >= 12.3.1, < 12.3.2 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.