{
  "cveId": "CVE-2021-3690",
  "url": "https://patchblox.com/security/cve/CVE-2021-3690",
  "summary": "CVE-2021-3690 is fixed in undertow on 1 platform by DEBIAN-CVE-2021-3690 (version 2.2.10-1), released August 23, 2022. It is not reported as exploited. Patch Radar priority: High.",
  "title": "undertow: A flaw was found in Undertow",
  "description": "A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.",
  "published": "2022-08-23T16:15:09Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.01774,
  "epssPercentile": 0.78319,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "undertow",
      "release": "Debian 14",
      "fixedVersion": "2.2.10-1",
      "fix": "DEBIAN-CVE-2021-3690",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-3690",
      "released": "2022-08-23T16:15:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}