CVE-2026-35210

{"id": "CVE-2026-35210", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-35210", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-09T13:45:35.902145Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 4.2, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "OpenCTI-Platform", "product": "opencti", "versions": [{"status": "affected", "version": "< 7.260326.0"}]}]}], "published": "2026-07-08T21:16:48.487", "references": [{"url": "https://github.com/OpenCTI-Platform/opencti/commit/134531ddf5ecf741006b7f0870b7c36711b96540", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/OpenCTI-Platform/opencti/pull/14243", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/OpenCTI-Platform/opencti/releases/tag/7.260326.0", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-36fr-4m54-94mj", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-639"}, {"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 7.260326.0, an authorization bypass vulnerability in OpenCTI allows any authenticated user with KNOWLEDGE_KNUPDATE permission to bypass Confidence Level validation and Object Marking restrictions by injecting the synchronized-upsert: true HTTP header, enabling attackers to downgrade confidence levels, remove security markings such as TLP:RED, manipulate relationships, and affect STIX object types including Indicators, ThreatActors, Malware, and Reports. This issue is fixed in version 7.260326.0."}, {"lang": "es", "value": "OpenCTI es una plataforma de c\u00f3digo abierto para gestionar el conocimiento y los observables de inteligencia de ciberamenazas. Antes de la versi\u00f3n 7.260326.0, una vulnerabilidad de omisi\u00f3n de autorizaci\u00f3n en OpenCTI permite a cualquier usuario autenticado con permiso KNOWLEDGE_KNUPDATE omitir la validaci\u00f3n del Nivel de Confianza y las restricciones de Marcado de Objetos inyectando el encabezado HTTP synchronized-upsert: true, lo que permite a los atacantes degradar los niveles de confianza, eliminar marcados de seguridad como TLP:RED, manipular relaciones y afectar tipos de objetos STIX incluyendo Indicadores, Actores de Amenazas, malware y Reportes. Este problema est\u00e1 solucionado en la versi\u00f3n 7.260326.0."}], "lastModified": "2026-10-25T17:10:00.197", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D2A38ACA-975B-4CBA-AE56-59D167D8D270", "versionEndExcluding": "7.260326.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}