In lib/mini_magick/image.rb in MiniMagick before 4.9.4, a fetched remote image filename could cause remote command execution because Image.open input is directly passed to Kernel#open, which accepts a | character followed by a command.
{
"nvd_published_at": "2019-07-12T03:15:00Z",
"github_reviewed_at": "2019-07-18T13:18:58Z",
"severity": "HIGH",
"cwe_ids": [
"CWE-78"
],
"github_reviewed": true
}