CVE-2020-3839: Apple Mac OS X

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A validation issue was addressed with improved input sanitization. This issue is fixed in macOS Catalina 10.15.3. An application may be able to read restricted memory.

Affected products

• Apple Mac OS X: before 10.15.3 (fixed in 10.15.3)

Published 2020-02-27. Last modified 2026-06-17.