State issues in macOS - CVE-2026-84635

Vulnerability identifier: #VU149910

CSH Severity: Low

CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-84635

CWE-ID: CWE-371

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a state management issue in WebKit. A remote attacker can trick the victim into opening a specially crafted file and perform an unexpected process termination.

macOS
Fedora
tvOS
watchOS
visionOS
Apple iOS
iPadOS
webkitgtk
Apple Safari

Install update from vendor's website.

macOS - update to 27.0 26A428
tvOS - update to 27.0 24J361
watchOS - update to 27.0 24R364
webkitgtk - addressed in versions 2.54.2-3.el10_3, 2.54.2-3.el10_4
Apple Safari - update to 27.0
visionOS - update to 27.0
Apple iOS - addressed in versions 27.0 24A427, 27.0 24A437
iPadOS - update to 27.0 24A437

• https://support.apple.com/en-us/149035

• Multiple vulnerabilities in macOS
• Multiple vulnerabilities in Apple Safari
• Multiple vulnerabilities in Apple iOS 27 and iPadOS 27
• Multiple vulnerabilities in Apple visionOS
• Multiple vulnerabilities in Apple watchOS
• Multiple vulnerabilities in Apple tvOS
• Fedora EPEL 10.4 update for webkitgtk
• Fedora EPEL 10.3 update for webkitgtk