In Pallets Jinja before 2.10.1, str.format_map allows a sandbox escape.
https://usn.ubuntu.com/4011-2/
https://usn.ubuntu.com/4011-1/
https://palletsprojects.com/blog/jinja-2-10-1-released
https://access.redhat.com/errata/RHSA-2019:1329
https://access.redhat.com/errata/RHSA-2019:1237
https://access.redhat.com/errata/RHSA-2019:1152
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00064.html
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00030.html