Missing Authorization in Compute Engine allows Cross-Project Disk Exfiltration

{
  "id": "baa2605ae401edb33c1e6a3a00bb17b7dee03ca6ef7aaf95f6142ff6b451bb1a",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-85299",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Missing Authorization in Compute Engine allows Cross-Project Disk Exfiltration",
    "summary": "A Missing Authorization vulnerability in the disks.createSnapshot and regionDisks.createSnapshot APIs in Google Compute Engine versions prior to 2026-08-31 on Google Cloud Platform allows an authenticated attacker to exfiltrate cross-project disk data. This vulnerability was patched on 31 August 2026, and no customer action is needed.",
    "evidence": "cve:CVE-2026-85299",
    "products": [
      {
        "name": {
          "value": "Compute Engine",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-85299",
      "aliases": [
        "CVE-2026-85299"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "Safety": "NOT_DEFINED",
            "version": "4.0",
            "Recovery": "NOT_DEFINED",
            "baseScore": 8.3,
            "Automatable": "NOT_DEFINED",
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/U:Clear",
            "exploitMaturity": "NOT_DEFINED",
            "providerUrgency": "CLEAR",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "LOW",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Google Cloud",
          "product": "Compute Engine",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "2026-08-31",
              "versionType": "date"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-27T09:02:32.461Z",
      "provider": "cve",
      "references": [
        "https://docs.cloud.google.com/compute/docs/security-bulletins#gcp-2026-073"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "f45cbf4e-4146-4068-b7e1-655ffc2c548c",
          "shortName": "GoogleCloud",
          "dateUpdated": "2026-10-27T09:02:32.461Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-85299",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 391554,
  "published_at": "2026-10-27T09:02:32.461+00:00"
}