Dependency Confusion in Bundler with Implicit Private Dependencies

Bundler 1.16.0 through 2.2.9 and 2.2.11 through 2.2.17 sometimes chooses a
dependency source based on the highest gem version number, which means that a
rogue gem found at a public source may be chosen, even if the intended choice
was a private gem that is a dependency of another private gem that is
explicitly depended on by the application.