CVE-2019-8662: Apple iPhone OS

Critical severity, CVSS 9.8. EPSS: 9.8% chance of exploitation in the next 30 days.

This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. An attacker may be able to trigger a use-after-free in an application deserializing an untrusted NSDictionary.

Affected products

• Apple iPhone OS: before 12.4 (fixed in 12.4)
• Apple Mac OS X: before 10.14.6 (fixed in 10.14.6)
• Apple tvOS: before 12.4 (fixed in 12.4)
• Apple watchOS: before 5.3 (fixed in 5.3)

Published 2019-12-18. Last modified 2026-06-17.