This affects the package npm-user-validate before 1.0.1. The regex that validates user emails took exponentially longer to process long input strings beginning with @ characters.
{
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"nvd_published_at": "2020-10-27T15:15:00Z",
"severity": "HIGH",
"github_reviewed_at": "2021-04-20T17:21:44Z"
}