{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "websocket-driver"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54463"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-15T22:01:52Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nThe frame format in draft versions of the WebSocket protocol includes a length header that allows an arbitrarily large integer to be encoded as a sequence of bytes with the high bit set. By sending an indefinite sequence of bytes with values `0x80` or above, a server or client can make the other peer parse these bytes into an ever-growing integer. Since Ruby integers are arbitrary precision, this can be used to make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory.\n\n### Patches\n\nThe issue has been patched in version 0.8.1. All users should upgrade to this version.\n\n### Workarounds\n\nNo known workarounds exist.\n\n### Acknowledgements\n\nThis issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.",
  "id": "GHSA-ghhp-3qvg-889p",
  "modified": "2026-07-15T22:01:52Z",
  "published": "2026-07-15T22:01:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-ghhp-3qvg-889p"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/faye/websocket-driver-ruby"
    },
    {
      "type": "WEB",
      "url": "https://github.com/faye/websocket-driver-ruby/releases/tag/0.8.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/websocket-driver/CVE-2026-54463.yml"
    },
    {
      "type": "WEB",
      "url": "https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54463"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": "websocket-driver: Memory exhaustion via abuse of protocol length headers"
}