Protection mechanism failure in WebKitGTK+ and WPE WebKit - CVE-2026-113952
Published: October 27, 2026
Vulnerability identifier: #VU157751
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-113952
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient implementation of security measures in WebKit. A remote attacker can force the browser to use a media format that should be restricted in Lockdown Mode.
Affected software
WebKitGTK+
WPE WebKit
Apple Safari
macOS
WPE WebKit
Apple Safari
macOS
How to mitigate CVE-2026-113952
Install updates from vendor's website.
Apple Safari - update to 27.2
macOS - update to 27.2 26B123
macOS - update to 27.2 26B123