The cgi.rb CGI library for Ruby 1.8 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via an HTTP request with a multipart MIME body that contains an invalid boundary specifier, as demonstrated using a specifier that begins with a "-" instead of "--" and contains an inconsistent ID.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.065
EPSS Ranking 90.6%