Information disclosure in WebKitGTK+ and WPE WebKit - CVE-2026-43708

Vulnerability identifier: #VU137106

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:N/SC:L/SI:N/SA:N]

CVE-ID: CVE-2026-43708

CWE-ID: CWE-200

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to improper input validation in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and exfiltrate data cross-origin.

WebKitGTK+
WPE WebKit
visionOS
tvOS
Apple iOS
iPadOS
macOS
watchOS
Apple Safari

Install update from vendor's website.

visionOS - update to 26.6
tvOS - update to 26.6 23L773
Apple iOS - addressed in versions 18.7.10 22H374, 26.5.2 23F84
iPadOS - addressed in versions 18.7.10 22H374, 26.5.2 23F84
macOS - update to 26.5.2 25F84
Apple Safari - update to 26.5.2
watchOS - update to 26.6 23U67

• https://support.apple.com/en-us/127595

• Multiple vulnerabilities in Apple macOS Tahoe
• Multiple vulnerabilities in Apple visionOS
• Multiple vulnerabilities in Apple tvOS
• Multiple vulnerabilities in Apple watchOS
• Multiple vulnerabilities in iOS 26 and iPadOS 26
• Multiple vulnerabilities in Apple Safari
• Multiple vulnerabilities in iOS 18 and iPadOS 18