{"id":"CVE-2026-84558","title":"A double free issue was addressed with improved memory management","summary":"A double free issue was addressed with improved memory management. This issue is fixed in macOS Golden Gate 27. An app may be able to cause unexpected system termination.","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-415"],"vendor":"apple","product":"macos","affected":["macos < 27.0"],"patched":["macos 27.0"],"published":"2026-09-14","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:16:49.670","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84558","references":[{"url":"https://support.apple.com/en-us/149035","label":"product-security@apple.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-17T16:51:41.969273Z"},"epss":0.0012,"epssPercentile":0.02066,"ingestedAt":"2026-09-14T21:15:17.488Z","slug":"CVE-2026-84558","body":"## Overview\n\nA double free issue was addressed with improved memory management. This issue is fixed in macOS Golden Gate 27. An app may be able to cause unexpected system termination.\n\n## Affected\n\n- `macos < 27.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `macos 27.0`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205329,"id":"CVE-2026-84558","ts":1789574371377,"field":"cvss","old":null,"new":"5.5"},{"seq":205328,"id":"CVE-2026-84558","ts":1789574371377,"field":"severity","old":"none","new":"medium"}]}