ruby is vulnerable to directory traversal. It mishandles path checking within File.fnmatch functions.
lists.opensuse.org/opensuse-security-announce/2020-03/msg00041.html
hackerone.com/reports/449617
lists.debian.org/debian-lts-announce/2019/11/msg00025.html
seclists.org/bugtraq/2019/Dec/31
seclists.org/bugtraq/2019/Dec/32
security.gentoo.org/glsa/202003-06
usn.ubuntu.com/4201-1/
www.debian.org/security/2019/dsa-4587
www.oracle.com/security-alerts/cpujan2020.html