CVE-2026-16496

{
  "id": "CVE-2026-16496",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-28T19:17:31.983",
  "lastModified": "2026-10-23T23:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The terraform-mcp-server before version 1.1.0 is vulnerable to an authorization bypass in the streamable-HTTP stateful transport mode that may allow a user who obtains another user's MCP session ID to have their tool calls executed using that user's Terraform credentials. This vulnerability, CVE-2026-16496, is fixed in terraform-mcp-server 1.1.0."
    },
    {
      "lang": "es",
      "value": "El terraform-mcp-server antes de la versión 1.1.0 es vulnerable a una omisión de autorización en el modo de transporte con estado HTTP transmisible que puede permitir que un usuario que obtiene el ID de sesión MCP de otro usuario ejecute sus llamadas a herramientas utilizando las credenciales de Terraform de ese usuario. Esta vulnerabilidad, CVE-2026-16496, se corrige en terraform-mcp-server 1.1.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "HashiCorp",
          "product": "Tooling",
          "defaultStatus": "unaffected",
          "platforms": [
            "64 bit",
            "32 bit",
            "x86",
            "ARM",
            "MacOS",
            "Windows",
            "Linux"
          ],
          "repo": "https://github.com/hashicorp/terraform-mcp-server",
          "versions": [
            {
              "version": "0.3.0",
              "lessThan": "1.1.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L",
          "baseScore": 8.9,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 6.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-28T18:42:15.101188Z",
          "id": "CVE-2026-16496",
          "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-384"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://discuss.hashicorp.com/t/hcsec-2026-23-multiple-vulnerabilities-impacting-hashicorp-terraform-mcp-server/77606",
      "source": "[email protected]"
    }
  ]
}