Language: JavaScript
Label: vulnerable
CWE: CWE-77 \u2014 Improper Neutralization of Special Elements used in a Command ('Command Injection')
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Code:
  untag: function (cb) {
    var cmd = ['git', 'tag', '-d', 'v' + this._version].join(' ')
    this._exec(cmd, cb)
  },