Provide references for CVE-2019-18853.
Where can I find more information about CVE-2019-18853?
References are available at: https://fortiguard.com/zeroday/FG-VD-19-136, https://github.com/ImageMagick/ImageMagick/commit/ec9c8944af2bfc65c697ca44f93a727a99b405f1.