CVE-2018-4456: Apple Mac OS X

High severity, CVSS 7.8. EPSS: 1.1% chance of exploitation in the next 30 days.

A memory corruption issue was addressed with improved input validation. This issue affected versions prior to macOS High Sierra 10.13.6, macOS Mojave 10.14.

Affected products

• Apple Mac OS X: before 10.13.6 (fixed in 10.13.6)

Published 2019-04-03. Last modified 2026-06-17.