{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "8.0.0"
              },
              {
                "last_affected": "8.12.4"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "fb74e3d03793a7f9c433a7be583d55e3e2d1c35d"
            },
            {
              "last_affected": "384e98e10c627921f663b5037ec8c13e46969ca7"
            }
          ],
          "repo": "https://github.com/vaadin/framework",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {},
  "details": "Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.",
  "id": "CVE-2021-31409",
  "modified": "2026-07-08T05:36:59.360654789Z",
  "published": "2021-05-06T13:15:12.633Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://vaadin.com/security/cve-2021-31409"
    },
    {
      "type": "FIX",
      "url": "https://github.com/vaadin/framework/issues/12240"
    },
    {
      "type": "FIX",
      "url": "https://github.com/vaadin/framework/pull/12241"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}