An issue was discovered in RubyGems 2.6 and later through 3.0.2. Since Gem::CommandManager#run calls alert_error without escaping, escape sequence injection is possible. (There are many ways to cause an error.)
{
"github_reviewed_at": "2019-06-20T16:04:35Z",
"nvd_published_at": null,
"cwe_ids": [
"CWE-74"
],
"severity": "HIGH",
"github_reviewed": true
}