{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "\u003ca href=\"https://x.com/yuvalavra\"\u003eYuval Avrahami\u003c/a\u003e"
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Critical"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      },
      {
        "category": "general",
        "text": "Not required. The vulnerability documented by this CVE requires no customer action to resolve.",
        "title": "Customer Action"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-23651 Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23651"
      },
      {
        "category": "self",
        "summary": "CVE-2026-23651 Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-23651.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Exploitability Index",
        "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability",
    "tracking": {
      "current_release_date": "2026-03-06T08:00:00.000Z",
      "generator": {
        "date": "2026-03-06T19:25:43.953Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-23651",
      "initial_release_date": "2026-03-05T08:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-03-05T08:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-03-06T08:00:00.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added FAQ information. This is an informational change only."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "category": "product_name",
        "name": "Microsoft ACI Confidential Containers",
        "product": {
          "name": "Microsoft ACI Confidential Containers",
          "product_id": "20672"
        }
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-23651",
      "cwe": {
        "id": "CWE-625",
        "name": "Permissive Regular Expression"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "This vulnerability has been mitigated by Microsoft in the Azure Confidential ACI service. No service update, patch, reboot, or upgrade is required.\nIn Azure Confidential ACI scenarios, customers are responsible for enforcing existing Confidential Compute security policies. Customers should verify that their policies enforce the documented minimum Security Version Number (SVN) for the Utility VM (UVM), as described in the Confidential ACI configuration guidance.\nIf a customer determines that their policy configuration does not align with the published minimum SVN guidance, correcting the configuration is part of normal policy enforcement and not a remediation action introduced by this CVE. No additional customer action is required beyond adherence to existing guidance.\nPlease refer to the following for more information: https://github.com/microsoft/confidential-aci-examples/blob/main/docs/Confidential_ACI_SCHEME.md",
          "title": "Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "20672"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-23651 Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23651"
        },
        {
          "category": "self",
          "summary": "CVE-2026-23651 Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-23651.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "PROOF_OF_CONCEPT",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.0,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "20672"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Elevation of Privilege"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability"
    }
  ]
}