CVE-2026-35210

{
  "id": "CVE-2026-35210",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-08T21:16:48.487",
  "lastModified": "2026-10-25T17:10:00.197",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "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 código abierto para gestionar el conocimiento y los observables de inteligencia de ciberamenazas. Antes de la versión 7.260326.0, una vulnerabilidad de omisión de autorización en OpenCTI permite a cualquier usuario autenticado con permiso KNOWLEDGE_KNUPDATE omitir la validación 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 está solucionado en la versión 7.260326.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "OpenCTI-Platform",
          "product": "opencti",
          "versions": [
            {
              "version": "< 7.260326.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-09T13:45:35.902145Z",
          "id": "CVE-2026-35210",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "7.260326.0",
              "matchCriteriaId": "D2A38ACA-975B-4CBA-AE56-59D167D8D270"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/OpenCTI-Platform/opencti/commit/134531ddf5ecf741006b7f0870b7c36711b96540",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/OpenCTI-Platform/opencti/pull/14243",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/OpenCTI-Platform/opencti/releases/tag/7.260326.0",
      "source": "[email protected]",
      "tags": [
        "Product",
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-36fr-4m54-94mj",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}