Affected versions of method-override are vulnerable to a regular expression denial of service vulnerability when untrusted user input is passed into the X-HTTP-Method-Override header.
Update to version 2.3.10 or later
{
"github_reviewed": true,
"cwe_ids": [
"CWE-400"
],
"nvd_published_at": null,
"github_reviewed_at": "2020-06-16T21:53:07Z",
"severity": "HIGH"
}