CVE-2026-59804

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Attackers can connect from any web page visited by the victim to seize the single-client slot, intercept and inject automation commands, exfiltrate command-payload data, or unconditionally terminate the server by supplying the MIDSCENE_BRIDGE_SIGNAL_KILL query parameter."}, {"lang": "es", "value": "Midscene Bridge Server hasta la versi\u00f3n 1.10.3, corregido en el commit 86f4118, contiene una vulnerabilidad de falta de autenticaci\u00f3n y mala configuraci\u00f3n de CORS que permite a atacantes remotos no autenticados secuestrar sesiones de puente activas abriendo una conexi\u00f3n WebSocket de origen cruzado al servidor Socket.IO local, que no realiza validaci\u00f3n del encabezado Origin y no requiere ning\u00fan token de autenticaci\u00f3n. Los atacantes pueden conectarse desde cualquier p\u00e1gina web visitada por la v\u00edctima para apoderarse del slot de un solo cliente, interceptar e inyectar comandos de automatizaci\u00f3n, exfiltrar datos de carga \u00fatil de comandos o terminar incondicionalmente el servidor suministrando el par\u00e1metro de consulta MIDSCENE_BRIDGE_SIGNAL_KILL."}], "id": "CVE-2026-59804", "lastModified": "2026-10-25T17:10:00.197", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.2, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.6, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-59804", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-09T14:02:32.806757Z", "version": "2.0.3"}}]}, "published": "2026-07-08T20:16:56.077", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/web-infra-dev/midscene/commit/86f4118d1d847041c63d79e347e08c87c3f1a882"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/web-infra-dev/midscene/issues/2752"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/web-infra-dev/midscene/pull/2759"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/midscene-bridge-server-session-hijack-via-unauthenticated-websocket"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-306"}, {"lang": "en", "value": "CWE-1385"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

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