CVE-2026-76404

{
  "id": "CVE-2026-76404",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-19T22:17:27.170",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Splunk MCP Server app versions below 1.2.1, a user who holds the \"admin\" Splunk role could execute arbitrary commands on the underlying operating system. The vulnerability is possible because of missing input validation in the app's credential management component, which deserializes stored data without checking whether the content is of the expected type."
    },
    {
      "lang": "es",
      "value": "En las versiones de la aplicación Splunk MCP Server anteriores a la 1.2.1, un usuario con el rol de Splunk ’admin’ podría ejecutar comandos arbitrarios en el sistema operativo subyacente. La vulnerabilidad es posible debido a la falta de validación de entrada en el componente de gestión de credenciales de la aplicación, que deserializa datos almacenados sin comprobar si el contenido es del tipo esperado."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Splunk",
          "product": "Splunk MCP Server app",
          "versions": [
            {
              "version": "1.2",
              "lessThan": "1.2.1",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "HIGH",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-20T15:09:45.301346Z",
          "id": "CVE-2026-76404",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:splunk:model_context_protocol_server:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.2.1",
              "matchCriteriaId": "D34DCE3E-FC83-4D4F-91BF-A2AD23B38838"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://advisory.splunk.com/advisories/SVD-2026-0808",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}