An issue was discovered in RubyGems 2.6 and later through 3.0.2. Since Gem::UserInteraction#verbose calls say without escaping, escape sequence injection is possible.
{
"nvd_published_at": null,
"severity": "HIGH",
"github_reviewed": true,
"github_reviewed_at": "2019-06-20T16:00:39Z",
"cwe_ids": [
"CWE-88"
]
}