CVE-2023-22795

A flaw was found in the rubygem-actionpack. RubyGem’s actionpack gem is vulnerable to a denial of service caused by a regular expression denial of service (ReDoS) flaw in Action Dispatch related to the If-None-Match header. By sending a specially-crafted HTTP If-None-Match header, a remote attacker can use large amounts of CPU and memory, resulting in a denial of service.