There is a possible DoS vulnerability in the multipart parser in Rack before 2.0.6. Specially crafted requests can cause the multipart parser to enter a pathological state, causing the parser to use CPU resources disproportionate to the request size.
{
"github_reviewed_at": "2020-06-16T21:40:04Z",
"cwe_ids": [
"CWE-400"
],
"nvd_published_at": "2018-11-13T23:29:00Z",
"github_reviewed": true,
"severity": "HIGH"
}