CVE-2026-84553: Apple macOS

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

A resource exhaustion issue was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. A remote attacker may be able to cause a denial-of-service.

Affected products

• Apple macOS: from 15.0, before 15.8 (fixed in 15.8); from 26.0, before 26.7 (fixed in 26.7)

Published 2026-09-14. Last modified 2026-09-15.