CVE-2026-48163 MariaDB: wsrep SST unsafe parameter handling on the donor side (rsync)
A malicious joiner node can execute arbitrary shell commands on the donor node during SST via rsync due to unsafe parameter handling.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48163?
CVE-2026-48163 is a high-severity command injection vulnerability in Mariadb Mariadb, published on 12 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-48163?
3 open source packages ship an affected version, including mariadb, mariadb-min and mysql-client. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mariadb Bitnami | From 10.6.1 | 10.6.27, 10.11.18, 11.4.12, 11.8.8, 12.3.2 |
mariadb-min Bitnami | From 10.6.1 | 10.6.27, 10.11.18, 11.4.12, 11.8.8, 12.3.2 |
mysql-client Bitnami | From 10.6.1 | 10.6.27, 10.11.18, 11.4.12, 11.8.8, 12.3.2 |
Products include Mariadb Mariadb.
How do I fix CVE-2026-48163?
Upgrade mariadb to a fixed version for your release line: 10.6.27, 10.11.18, 11.4.12 or 11.8.8.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-48163 being exploited?
There is no known exploitation of CVE-2026-48163 in the wild and no public exploit code.
Other vulnerabilities in Mariadb Mariadb
- CVE-2026-49261 MariaDB server has unsafe parameter handling in `wsrep_notify_cmd`
- CVE-2026-85746 MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections
- CVE-2026-85748 MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
- CVE-2026-92262 MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.
- CVE-2023-26785 Code injection in n/a
Sources
Also known as ALPINE-CVE-2026-48163, BELL-CVE-2026-48163, BIT-mariadb-2026-48163, BIT-mariadb-min-2026-48163, BIT-mysql-client-2026-48163, DEBIAN-CVE-2026-48163 and 10 more.