This update for flatpak fixes the following issues:
Security issues fixed:
CVE-2019-8308: Fixed a potential sandbox escape via /proc (bsc#1125431).
CVE-2019-11460: Fixed a compromised thumbnailer may escape the bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI ioctl (bsc#1133043).
CVE-2019-11461: Fixed a compromised thumbnailer may escape the bubblewrap sandbox used to confine thumbnailers by using the TIOCSTI ioctl (bsc#1133041).