CVE-2019-8834: Apple iCloud

Medium severity, CVSS 4.3. EPSS: 1.2% chance of exploitation in the next 30 days.

A configuration issue was addressed with additional restrictions. This issue is fixed in tvOS 13.3, watchOS 6.1.1, iCloud for Windows 10.9, macOS Catalina 10.15.2, Security Update 2019-002 Mojave, and Security Update 2019-007 High Sierra, iOS 13.3 and iPadOS 13.3, iTunes 12.10.3 for Windows, iCloud for Windows 7.16. An attacker in a privileged network position may be able to bypass HSTS for a limited number of specific top-level domains previously not in the HSTS preload list.

Affected products

• Apple iCloud: before 7.16 (fixed in 7.16); from 10.0, before 10.9 (fixed in 10.9)
• Apple iPadOS: before 13.3 (fixed in 13.3)
• Apple iPhone OS: before 13.3 (fixed in 13.3)
• Apple iTunes: before 12.10.3 (fixed in 12.10.3)
• Apple Mac OS X: before 10.15.2 (fixed in 10.15.2)
• Apple tvOS: before 13.3 (fixed in 13.3)
• Apple watchOS: before 6.1.1 (fixed in 6.1.1)

Published 2020-10-27. Last modified 2026-06-17.