{
  "cveId": "CVE-2020-7663",
  "url": "https://patchblox.com/security/cve/CVE-2020-7663",
  "summary": "CVE-2020-7663 is fixed in ruby-websocket-extensions on 1 platform, first by ruby-websocket-extensions 0.1.2-1\u002Bdeb9u1build0.18.04.1, released June 2, 2020. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "ruby-websocket-extensions: websocket-extensions ruby module prior to 0.1.5 allows Denial of Service (DoS) via Regex Backtracking",
  "description": "websocket-extensions ruby module prior to 0.1.5 allows Denial of Service (DoS) via Regex Backtracking. The extension parser may take quadratic time when parsing a header containing an unclosed string parameter value whose content is a repeating two-byte sequence of a backslash and some other character. This could be abused by an attacker to conduct Regex Denial Of Service (ReDoS) on a single-threaded server by providing a malicious payload with the Sec-WebSocket-Extensions header.",
  "published": "2020-06-02T12:15:00Z",
  "severity": "Medium",
  "epss": 0.04639,
  "epssPercentile": 0.91775,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "ruby-websocket-extensions",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.1.2-1\u002Bdeb9u1build0.18.04.1",
      "fix": "ruby-websocket-extensions 0.1.2-1\u002Bdeb9u1build0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-ruby-websocket-extensions-0.1.2-1-deb9u1build0.18.04.1",
      "released": "2020-06-02T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ruby-websocket-extensions",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "0.1.2-1\u002Bdeb9u1build0.20.04.1",
      "fix": "ruby-websocket-extensions 0.1.2-1\u002Bdeb9u1build0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-ruby-websocket-extensions-0.1.2-1-deb9u1build0.20.04.1",
      "released": "2020-06-02T12:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}