GHSA-ffpv-c4hm-3x6v actionpack is vulnerable to denial of service via a crafted HTTP Accept header

• RubyGems actionpack: >= 4.2.0, < 4.2.5.1 → fixed in 4.2.5.1 • RubyGems actionpack: < 3.2.22.1 → fixed in 3.2.22.1 • RubyGems actionpack: >= 4.0.0, < 4.1.14.1 → fixed in 4.1.14.1

actionpack/lib/action_dispatch/http/mime_type.rb in Action Pack in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 does not properly restrict use of the MIME type cache, which allows remote attackers to cause a denial of service (memory consumption) via a crafted HTTP Accept header.