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

10CRITICAL

Key Information:

Vendor

Mariadb

Status
Server
Vendor
CVE Published:
11 June 2026

What is CVE-2026-49261?

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 Version(s)

server >= 10.6.1, < 10.6.27 < 10.6.1, 10.6.27

server >= 10.11.1, < 10.11.18 < 10.11.1, 10.11.18

server >= 11.4.1, < 11.4.12 < 11.4.1, 11.4.12

References

https://github.com/MariaDB/server/security/advisories/GHS...
x_refsource_CONFIRM
https://jira.mariadb.org/browse/MDEV-39721
x_refsource_MISC

CVSS V3.1

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.