CVE-2020-27939: Apple macOS

High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days.

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave. Processing a maliciously crafted image may lead to arbitrary code execution.

Affected products

• Apple macOS: before 11.1.0 (fixed in 11.1.0)

Published 2021-04-02. Last modified 2026-06-17.