high CVSS 8

CVE-2026-48165·MariaDB vulnerability

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, a high-privileged MariaDB user could've used wsrep_sst_receive_address or wsrep_sst_donor global system variables to execute shell commands as the uid of the mariadbd process on the galera joiner node. This issue has been patched in versions 10.6.27, 10.11.18, 11.4.12, 11.8.8, and 12.3.2.

Severity
high
Software
MariaDB
Fixed in
11.8.8
Published
2026-06-12

Affected versions

From: 11.8.1

Until: 11.8.8

Fixed in: 11.8.8

How to fix this CVE

MariaDB versions 11.8.1 through 11.8.7 contain a privilege escalation vulnerability in Galera cluster configuration that allows high-privileged users to execute arbitrary shell commands. Upgrade to version 11.8.8 or later immediately to eliminate this risk. If you are running MariaDB in a Galera cluster environment, prioritize this update to prevent unauthorized command execution.

sudo dnf update mariadb-server

Defensia detects this vulnerability

How to check if you are affected

  1. Check installed MariaDB version: mysql -V or SELECT VERSION(); from the MariaDB shell
  2. Verify Galera cluster status if enabled: SHOW STATUS LIKE 'wsrep%'; to confirm cluster membership and configuration variables
  3. Search system logs and MariaDB error logs for suspicious wsrep_sst_receive_address or wsrep_sst_donor variable modifications: grep -r 'wsrep_sst' /var/log/mysql/ /var/log/mariadb/
  4. Confirm the patch by upgrading and re-running mysql -V to verify the version is 11.8.8 or later

FAQ

What is CVE-2026-48165?

CVE-2026-48165 is a privilege escalation vulnerability in MariaDB's Galera cluster implementation that allows database administrators with high privileges to execute arbitrary shell commands on cluster nodes by manipulating global system variables during state transfer operations.

Is CVE-2026-48165 being actively exploited?

No, there is no evidence of active exploitation in the wild, and no public exploit code is available. However, the vulnerability requires high database privileges, limiting the attack surface to trusted internal actors.

What versions of MariaDB are affected by CVE-2026-48165?

MariaDB versions 10.6.1–10.6.26, 10.11.1–10.11.17, 11.4.1–11.4.11, 11.8.1–11.8.7, and 12.3.1 are vulnerable. The 11.8.x series is affected from 11.8.1 to 11.8.7.

How do I check if my server is vulnerable to CVE-2026-48165?

Connect to MariaDB and run SELECT VERSION(); to retrieve your version number. If it falls within the affected ranges (11.8.1–11.8.7 for the 11.8 branch), your server is vulnerable.

Does Defensia detect CVE-2026-48165?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If MariaDB is installed on a monitored server, CVE-2026-48165 will appear in your dashboard with remediation steps.

Related MariaDB CVEs

CVE-2026-49261CVSS 10MariaDB server is a community developed fork of MySQL server. Versions 10.6.1 through 10.6.26, 10.11.1 through 10.11.17, 11.4.1 through 11.4.11, 11.8.1 through 11.8.7, and 12.3.1 with `wsrep_notify_cmd` enabled would execute shell commands embedded in the name of the joiner node. This is fixed in 10.6.27, 10.11.18, 11.4.12, 11.8.8, and 12.3.2. As a workaround, anyone who cannot upgrade now should disable `wsrep_notify_cmd`.
CVE-2026-44170CVSS 9.8MariaDB 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, MariaDB on WIndows with installed CONNECT engine and enabled REST support interpolated table HTTP attribute into the curl command line without proper sanitizing. This allows the user to execute shell commands on the server. This issue has been patched in versions 10.6.26, 10.11.17, 11.4.11, 11.8.7, and 12.3.2.
CVE-2026-22730CVSS 8.8A critical SQL injection vulnerability in Spring AI's MariaDBFilterExpressionConverter allows attackers to bypass metadata-based access controls and execute arbitrary SQL commands. The vulnerability exists due to missing input sanitization.
CVE-2026-32710CVSS 8.5MariaDB server is a community developed fork of MySQL server. An authenticated user can crash MariaDB versions 11.4 before 11.4.10 and 11.8 before 11.8.6 via a bug in JSON_SCHEMA_VALID() function. Under certain conditions it might be possible to turn the crash into a remote code execution. These conditions require tight control over memory layout which is generally only attainable in a lab environment. This issue is fixed in MariaDB 11.4.10, MariaDB 11.8.6, and MariaDB 12.2.2.
CVE-2026-44168CVSS 8MariaDB 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.

References

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