You may have been alerted by the announcement that the xz software has been modified to introduce a backdoor (CVE-2024-3094).
This software is a file compression utility. It is widely used in Mageia, since RPM packages are compressed using this utility.
The alert concerns versions 5.6.0 and 5.6.1 of the software. Mageia does not use and has never used these versions. Mageia users therefore have no particular action to take.