A security issue fixed upstream in ruby-sprockets has been announced: http://openwall.com/lists/oss-security/2018/06/19/2
We won't be fixing this package (dropped in Mageia 6). Bug filed for information purposes.
Resolution: (none) => OLDStatus: NEW => RESOLVED
openSUSE has issued an advisory for this on June 29: https://lists.opensuse.org/opensuse-updates/2018-06/msg00146.html