{
  "threat_severity" : "Important",
  "public_date" : "2026-07-08T15:35:39Z",
  "bugzilla" : {
    "description" : "engine.io: Engine.IO: Denial of Service via crafted WebTransport session ID",
    "id" : "2498128",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2498128"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-843",
  "details" : [ "Socket.IO enables bidirectional and low-latency communication for every platform. From 6.5.0 before 6.6.7, Engine.IO servers with WebTransport enabled can resolve a crafted session ID such as __proto__ through an inherited property of the clients object during WebTransport upgrade handling, causing a TypeError and denial of service. This issue is fixed in version 6.6.7.", "A flaw was found in Engine.IO. When Engine.IO servers have WebTransport enabled, a remote attacker can craft a session ID to resolve an inherited property of the clients object during WebTransport upgrade handling. This can lead to a TypeError, resulting in a denial of service (DoS) for the server. This vulnerability impacts the availability of the service." ],
  "statement" : "This flaw has been rated as Important. When Engine.IO servers have WebTransport enabled, a remote attacker can trigger a denial of service. This occurs by sending a crafted session ID that resolves an inherited property during WebTransport upgrade handling, leading to a TypeError and impacting service availability.",
  "affected_release" : [ {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-06-18T00:00:00Z",
    "advisory" : "RHSA-2026:26994",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "dotnet8-0-main-8.0.128-1.hum1",
    "impact" : "important"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Affected",
    "package_name" : "rhelai3/bootc-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Affected",
    "package_name" : "rhelai3/bootc-gaudi-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Affected",
    "package_name" : "rhelai3/bootc-rocm-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Affected",
    "package_name" : "rhelai3/disk-image-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-59724\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-59724\nhttps://github.com/socketio/socket.io/commit/1fa1f46cd420ac5b57bb4c04c959b58f3c79158c\nhttps://github.com/socketio/socket.io/releases/tag/engine.io@6.6.7\nhttps://github.com/socketio/socket.io/security/advisories/GHSA-gr94-w7qr-f4j3" ],
  "name" : "CVE-2026-59724",
  "csaw" : false
}