Bucket Squatting in Cloud Run MCP leads to Service Account Takeover

{
  "id": "ac3bf4372cfbe227d4720b78ff718e7acbbc5e2d8edf57286280309b23d66f3c",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-85297",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bucket Squatting in Cloud Run MCP leads to Service Account Takeover",
    "summary": "Bucket Squatting in Google Cloud Run MCP versions prior to 1.11.0 on Google Cloud Platform allows an attacker to intercept and access proprietary source code, execute arbitrary code and exfiltrate data. Users must upgrade to Cloud Run MCP version 1.11.0 or later.",
    "evidence": "cve:CVE-2026-85297",
    "products": [
      {
        "name": {
          "value": "Cloud Run MCP",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-85297",
      "aliases": [
        "CVE-2026-85297"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "Safety": "NOT_DEFINED",
            "version": "4.0",
            "Recovery": "NOT_DEFINED",
            "baseScore": 7.7,
            "Automatable": "NOT_DEFINED",
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/U:Amber",
            "exploitMaturity": "NOT_DEFINED",
            "providerUrgency": "AMBER",
            "userInteraction": "PASSIVE",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "LOW",
            "vulnIntegrityImpact": "HIGH",
            "subAvailabilityImpact": "LOW",
            "vulnAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "LOW",
            "vulnConfidentialityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Google Cloud",
          "product": "Cloud Run MCP",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.11.0",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T14:58:30.464Z",
      "provider": "cve",
      "references": [
        "https://github.com/GoogleCloudPlatform/cloud-run-mcp/releases/tag/v1.11.0"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "f45cbf4e-4146-4068-b7e1-655ffc2c548c",
          "shortName": "GoogleCloud",
          "dateUpdated": "2026-10-26T14:58:30.464Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-85297",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 314044,
  "published_at": "2026-10-26T14:58:30.464+00:00"
}