CVE-2026-64727: Apple macOS

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

A type confusion issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.6, tvOS 26.6. An app may be able to cause unexpected system termination.

Affected products

• Apple macOS: from 26.0, before 26.6 (fixed in 26.6)
• Apple tvOS: before 26.6 (fixed in 26.6)

Published 2026-07-27. Last modified 2026-07-29.