Missing Authorization in MCP Toolbox for Databases allows Arbitrary File Read and Write

{
  "id": "f8493305f3be1c46c3817ebc9582634db09e00344641af7221d3086d7a9122b5",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-93328",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Missing Authorization in MCP Toolbox for Databases allows Arbitrary File Read and Write",
    "summary": "Path Traversal and Missing Authorization in cloud-storage source in Google Cloud MCP Toolbox for Databases (googleapis/mcp-toolbox) versions 1.2.0 through 1.4.0 allows an unauthenticated remote attacker to exfiltrate host files to external Google Cloud Storage buckets and overwrite arbitrary local files via crafted tool invocation parameters.",
    "evidence": "cve:CVE-2026-93328",
    "products": [
      {
        "name": {
          "value": "MCP Toolbox for Databases (googleapis/mcp-toolbox)",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-93328",
      "aliases": [
        "CVE-2026-93328"
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      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "Safety": "NOT_DEFINED",
            "version": "4.0",
            "Recovery": "NOT_DEFINED",
            "baseScore": 9.3,
            "Automatable": "NOT_DEFINED",
            "attackVector": "NETWORK",
            "baseSeverity": "CRITICAL",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/U:Amber",
            "exploitMaturity": "NOT_DEFINED",
            "providerUrgency": "AMBER",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "LOW",
            "vulnIntegrityImpact": "HIGH",
            "subAvailabilityImpact": "LOW",
            "vulnAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "LOW",
            "vulnConfidentialityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
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      ],
      "affected": [
        {
          "vendor": "Google Cloud",
          "product": "MCP Toolbox for Databases (googleapis/mcp-toolbox)",
          "versions": [
            {
              "status": "affected",
              "version": "1.2.0",
              "lessThan": "1.5.0",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T16:46:45.879Z",
      "provider": "cve",
      "references": [
        "https://github.com/googleapis/mcp-toolbox/pull/3454"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-93328",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-26T15:33:21.057931Z"
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            "providerMetadata": {
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        "cna": {
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          "shortName": "GoogleCloud",
          "dateUpdated": "2026-10-26T14:24:09.012Z"
        }
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    },
    "related_cves": [
      {
        "value": "CVE-2026-93328",
        "evidence": "/cveMetadata/cveId"
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    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 320621,
  "published_at": "2026-10-26T14:24:09.012+00:00"
}