Skip to content

wsrep SST unsafe parameter handling on the donor side

High
vuvova published GHSA-vwf7-w26c-9w5h May 18, 2026

Package

No package listed

Affected versions

10.6.1-10.6.25, 10.11.1-10.11.16, 11.4.1-11.4.10, 11.8.1-11.8.6, 12.3.1

Patched versions

10.6.26, 10.11.17, 11.4.11, 11.8.7, 12.3.2

Description

Impact

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.

Patches

Fixed in 10.6.26, 10.11.17, 11.4.11, 11.8.7, 12.3.2.

References

https://jira.mariadb.org/browse/MDEV-39413

Credits

Asim Viladi Oglu Manizada

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

CVE ID

CVE-2026-44168

Weaknesses

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product 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. Learn more on MITRE.