{"id":"CVE-2026-43761","title":"An out-of-bounds write issue was addressed with improved bounds checking","summary":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Mounting a malicious disk image may cause unexpected system termination.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-787"],"vendor":"apple","product":"macos","affected":["macos >= 14.0, < 14.8.8","macos >= 15.0, < 15.7.8","macos >= 26.0, < 26.6"],"patched":["macos 26.6"],"published":"2026-09-14","updated":"2026-09-15","sourceUpdated":"2026-09-15T19:23:08.817","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-43761","references":[{"url":"https://support.apple.com/en-us/128067","label":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/128071","label":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/128072","label":"product-security@apple.com"}],"tags":["nvd","cve.org"],"epss":0.0038,"epssPercentile":0.31903,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T14:34:14.849776Z"},"ingestedAt":"2026-09-14T21:15:17.472Z","slug":"CVE-2026-43761","body":"## Overview\n\nAn out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Mounting a malicious disk image may cause unexpected system termination.\n\n## Affected\n\n- `macos >= 14.0, < 14.8.8`\n- `macos >= 15.0, < 15.7.8`\n- `macos >= 26.0, < 26.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `macos 26.6`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":203755,"id":"CVE-2026-43761","ts":1789486789307,"field":"cvss","old":null,"new":"6.5"},{"seq":203754,"id":"CVE-2026-43761","ts":1789486789307,"field":"severity","old":"none","new":"medium"}]}