CVE-2026-59724

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{"affected": [{"affectedData": [{"product": "socket.io", "vendor": "socketio", "versions": [{"status": "affected", "version": ">= 6.5.0, < 6.6.7"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:socket:engine.io:*:*:*:*:*:node.js:*:*", "matchCriteriaId": "96612FDE-E815-461C-9ABA-08B2979A8698", "versionEndExcluding": "6.6.7", "versionStartIncluding": "6.5.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Socket.IO permite la comunicaci\u00f3n bidireccional y de baja latencia para todas las plataformas. Desde la versi\u00f3n 6.5.0 hasta la 6.6.7, los servidores de Engine.IO con WebTransport habilitado pueden resolver un ID de sesi\u00f3n manipulado, como __proto__, a trav\u00e9s de una propiedad heredada del objeto clients durante el manejo de la actualizaci\u00f3n de WebTransport, causando un TypeError y denegaci\u00f3n de servicio. Este problema se corrige en la versi\u00f3n 6.6.7."}], "id": "CVE-2026-59724", "lastModified": "2026-10-25T20:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-59724", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-08T17:58:43.578991Z", "version": "2.0.3"}}]}, "published": "2026-07-08T16:16:32.980", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/socketio/socket.io/commit/1fa1f46cd420ac5b57bb4c04c959b58f3c79158c"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/socketio/socket.io/releases/tag/engine.io@6.6.7"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory", "Mitigation"], "url": "https://github.com/socketio/socket.io/security/advisories/GHSA-gr94-w7qr-f4j3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"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": "2026-08-12T10:15:02.519621+00:00", "vendors": ["socket", "socket$PRODUCT$socket.io"]}