{
  "cveId": "CVE-2021-21419",
  "url": "https://patchblox.com/security/cve/CVE-2021-21419",
  "summary": "CVE-2021-21419 is fixed in python3-eventlet on 1 platform by python3-eventlet 0.25.1-2ubuntu1.1 (version 0.25.1-2ubuntu1.1), released May 7, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "python3-eventlet: Eventlet is a concurrent networking library for Python",
  "description": "Eventlet is a concurrent networking library for Python. A websocket peer may exhaust memory on Eventlet side by sending very large websocket frames. Malicious peer may exhaust memory on Eventlet side by sending highly compressed data frame. A patch in version 0.31.0 restricts websocket frame to reasonable limits. As a workaround, restricting memory usage via OS limits would help against overall machine exhaustion, but there is no workaround to protect Eventlet process.",
  "published": "2021-05-07T08:15:00Z",
  "severity": "Medium",
  "epss": 0.01792,
  "epssPercentile": 0.78538,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python3-eventlet",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "0.25.1-2ubuntu1.1",
      "fix": "python3-eventlet 0.25.1-2ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-eventlet-0.25.1-2ubuntu1.1",
      "released": "2021-05-07T08:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}