GitLab is a self-hosted, Git (version control system) project repository application developed in Ruby on Rails by GitLab, Inc. GitLab is a denial-of-service vulnerability that can be used to access a project’s file content, commit history, bug list, and more. The vulnerability stems from the program’s failure to adequately validate user input. A remote attacker could exploit this vulnerability to perform a denial of service (DoS) attack with specially crafted input.