ImageMagick 7.0.6-6 has a large loop vulnerability in ReadWPGImage in coders/wpg.c, causing CPU exhaustion via a crafted wpg image file.
https://github.com/ImageMagick/ImageMagick/commit/7d63315a64267c565d1f34b9cb523a14616fed24
https://github.com/ImageMagick/ImageMagick/issues/654
https://lists.debian.org/debian-lts-announce/2019/05/msg00015.html
https://lists.debian.org/debian-lts-announce/2020/09/msg00007.html