Improper input validation in WPE WebKit and WebKitGTK+ - CVE-2026-28917

Vulnerability identifier: #VU131081

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-28917

CWE-ID: CWE-20

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 insufficient input validation in WebKit. A remote attacker can trick the victim into opening a specially crafted website and perform an unexpected process crash.

WPE WebKit
WebKitGTK+
Apple iOS
iPadOS
macOS
tvOS
visionOS
watchOS

Install update from vendor's website.

Apple iOS - addressed in versions 18.7.9 22H355, 26.5 23F77
iPadOS - addressed in versions 18.7.9 22H355, 26.5 23F77
macOS - update to 26.5 25F71
tvOS - update to 26.5 23L471
visionOS - update to 26.5
watchOS - update to 26.5 23T570

• https://support.apple.com/en-us/127115

• Multiple vulnerabilities in WebKitGTK+ and WPE WebKit
• Multiple vulnerabilities in Apple macOS Tahoe
• Multiple vulnerabilities in Apple iOS 18 and iPadOS 18
• Multiple vulnerabilities in Apple iOS 26 and iPadOS 26
• Multiple vulnerabilities in Apple tvOS
• Multiple vulnerabilities in Apple watchOS
• Multiple vulnerabilities in Apple visionOS