macOS — security advisory

{
  "id": "a631798ebf4da943478f46a00ff3b161c2dc6e0bbda4e2ae9884771e46f7ea93",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-84539",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-84539",
    "summary": "An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Tahoe 26.7.2. An app may be able to cause unexpected system termination.",
    "evidence": "cve:CVE-2026-84539",
    "products": [
      {
        "name": {
          "value": "macOS",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-84539",
      "aliases": [
        "CVE-2026-84539"
      ],
      "metrics": [],
      "affected": [
        {
          "vendor": "Apple",
          "product": "macOS",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "26.7.2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "27",
              "versionType": "custom"
            }
          ]
        }
      ],
      "modified": "2026-10-26T20:42:56.382Z",
      "provider": "cve",
      "references": [
        "https://support.apple.com/en-us/149035",
        "https://support.apple.com/en-us/149522"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
          "shortName": "apple",
          "dateUpdated": "2026-10-26T20:42:56.382Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-84539",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-cve",
  "document_id": 344430,
  "published_at": "2026-10-26T20:42:56.382+00:00"
}