{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.0.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "npm-user-validate"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2020-10-16T18:56:02Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "`npm-user-validate` before version `1.0.1` is vulnerable to a Regular Expression Denial of Service (REDos). The regex that validates user emails took exponentially longer to process long input strings beginning with `@` characters.\n\n### Impact\nThe issue affects the `email` function. If you use this function to process arbitrary user input with no character limit the application may be susceptible to Denial of Service.\n\n### Patches\nThe issue is patched in version 1.0.1 by improving the regular expression used and also enforcing a 254 character limit.\n\n### Workarounds\nRestrict the character length to a reasonable degree before passing a value to `.emal()`; Also, consider doing a more rigorous sanitizing/validation beforehand.",
  "id": "GHSA-xgh6-85xh-479p",
  "modified": "2020-10-16T18:56:02Z",
  "published": "2020-10-16T18:56:26Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/npm/npm-user-validate/security/advisories/GHSA-xgh6-85xh-479p"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Regular Expression Denial of Service in npm-user-validate"
}