{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "websocket-driver"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.7.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54466"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-130"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-15T22:07:24Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "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 client can make the server parse these bytes into an ever-growing integer. Since JavaScript numbers are 64-bit floating point values, this number will eventually lose precision and lead to the subsequent payload being parsed incorrectly.\n\n### Patches\n\nThe issue has been patched in version 0.7.5 by rejecting the message if the length header exceeds the configured maximum message length. 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-xv26-6w52-cph6",
  "modified": "2026-07-15T22:07:24Z",
  "published": "2026-07-15T22:07:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/faye/websocket-driver-node/security/advisories/GHSA-xv26-6w52-cph6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/faye/websocket-driver-node"
    },
    {
      "type": "WEB",
      "url": "https://github.com/faye/websocket-driver-node/releases/tag/0.7.5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "websocket-driver: Message corruption via abuse of protocol length headers"
}