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{"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"}, "csaw": false, "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": "draft"}, "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."], "name": "CVE-2026-59724", "package_state": [{"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "package_name": "rhelai3/bootc-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "package_name": "rhelai3/bootc-gaudi-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "package_name": "rhelai3/bootc-rocm-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "package_name": "rhelai3/disk-image-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "impact": "important", "package_name": "dotnet8.0", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-08T15:35:39Z", "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"], "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.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.5.0,6.6.7)"}}], "enrichment": {"confidence": 94.0, "confidence_source": "matching", "scores": [{"score": 94.0, "source": "matching"}]}, "original": {"product": "socket.io", "source": "cna", "vendor": "socketio"}, "product": "socket.io", "vendor": "socket"}], "created": "2026-07-10T05:45:04.801856+00:00", "updated": "2026-07-10T09:15:16.881168+00:00", "vendors": ["socket", "socket$PRODUCT$socket.io"]}