I have a CB-Gallery field with sponsor logos, some of them in PNG, some in SVG. It works fine so far, but when rebuilding the CB-Fields, I noticed that there a lots of error messages for the SVGs:
[pThumb] Resource: 3598 || Image: /www/htdocs/XXXXXXXXX/assets/XXX/media/logi/3598/BMBF_Logo.svg Could not cache thumbnail to file at: /www/htdocs/XXXXXXXXX/assets/image cache/XXX/media/logi/3598/BMBF_Logo.1b1fae78.jpg Resizer debug output:  => Resizer v1.0.1  => Using GD  => Input file: /www/htdocs/XXXXXXXXX/assets/XXX/media/logi/3598/BMBF_Logo.svg  => Input options: 'w' => '300', 'f' => 'jpeg'  => *** Error *** Unable to open image /www/htdocs/XXXXXXXXX/assets/XXX/media/logi/3598/BMBF_Logo.svg
Also in the image-field, when you defined a crop and then use an svg-image in that field you get into trouble.
Maybe there should be an internal check that prevents thumbnails and crops for svg-images.