CVE-2026-49261 — MariaDB server has unsafe parameter handling in `wsrep_notify_cmd`

Description (CNA)

MariaDB 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`.

Affected (CNA)

Vendor / product	Versions
MariaDB / server	affected >= 10.6.1, < 10.6.27; affected >= 10.11.1, < 10.11.18; affected >= 11.4.1, < 11.4.12; affected >= 11.8.1, < 11.8.8; affected = 12.3.1

CWE

CWE-78

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

A flaw was found in MariaDB server. When the `wsrep_notify_cmd` feature is enabled, a remote attacker could exploit this vulnerability by embedding shell commands in the name of a joiner node. This could lead to arbitrary code execution on the server, allowing the attacker to take full control of the affected system.