Use after free in WPE WebKit and WebKitGTK+ - CVE-2026-28946

Vulnerability identifier: #VU131083

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-2026-28946

CWE-ID: CWE-416

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 use-after-free error in WebKit. A remote attacker can trick the victim into opening a specially crafted website and perform an unexpected Safari crash.

WPE WebKit
WebKitGTK+
SUSE Linux Enterprise Server 15 SP4
Debian Linux
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Basesystem Module
Desktop Applications Module
Development Tools Module
openSUSE Leap
macOS
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
webkit2gtk3 (Red Hat package)
webkitgtk
webkit2gtk3-jsc-devel
webkit2gtk3-jsc
webkit2gtk3-devel
webkit2gtk3
typelib-1_0-WebKit2WebExtension-4_0
webkit2gtk-4_0-injected-bundles-debuginfo
libwebkit2gtk3-lang
webkit2gtk3-debugsource
libwebkit2gtk-4_0-37
typelib-1_0-JavaScriptCore-4_0
typelib-1_0-WebKit2-4_0
webkit2gtk-4_0-injected-bundles
libwebkit2gtk-4_0-37-debuginfo
libjavascriptcoregtk-4_0-18-debuginfo
libjavascriptcoregtk-4_0-18
typelib-1_0-WebKit-6_0
libwebkit2gtk-4_1-0-debuginfo
webkit-jsc-6.0-debuginfo
webkit2gtk4-devel
webkit-jsc-4.1
webkit-jsc-4
typelib-1_0-WebKitWebProcessExtension-6_0
webkit2gtk3-soup2-debugsource
webkit2gtk4-minibrowser
webkitgtk-6_0-injected-bundles-debuginfo
webkit2gtk3-minibrowser
libjavascriptcoregtk-4_1-0
webkit-jsc-6.0
typelib-1_0-WebKit2-4_1
libwebkitgtk-6_0-4-debuginfo
webkit2gtk3-soup2-minibrowser-debuginfo
typelib-1_0-WebKit2WebExtension-4_1
webkit2gtk-4_1-injected-bundles
libjavascriptcoregtk-6_0-1
libjavascriptcoregtk-4_1-0-debuginfo
libwebkit2gtk-4_0-37-32bit
libwebkit2gtk-4_1-0-64bit
libjavascriptcoregtk-4_1-0-64bit-debuginfo
libwebkit2gtk-4_0-37-64bit
libwebkit2gtk-4_1-0-64bit-debuginfo
libjavascriptcoregtk-4_0-18-64bit-debuginfo
libwebkit2gtk-4_0-37-64bit-debuginfo
libjavascriptcoregtk-4_0-18-64bit
libjavascriptcoregtk-4_1-0-64bit
libwebkit2gtk-4_1-0-32bit-debuginfo
libwebkit2gtk-4_1-0-32bit
libjavascriptcoregtk-4_1-0-32bit
libjavascriptcoregtk-4_1-0-32bit-debuginfo
libjavascriptcoregtk-4_0-18-32bit-debuginfo
libwebkit2gtk-4_0-37-32bit-debuginfo
libjavascriptcoregtk-4_0-18-32bit
libwebkit2gtk-4_1-0
webkit2gtk3-soup2-devel
typelib-1_0-JavaScriptCore-6_0
webkit2gtk3-minibrowser-debuginfo
typelib-1_0-JavaScriptCore-4_1
libwebkitgtk-6_0-4
webkit2gtk4-minibrowser-debuginfo
webkit2gtk-4_1-injected-bundles-debuginfo
WebKitGTK-4.1-lang
WebKitGTK-4.0-lang
WebKitGTK-6.0-lang
webkit-jsc-4-debuginfo
webkitgtk-6_0-injected-bundles
libjavascriptcoregtk-6_0-1-debuginfo
webkit2gtk4-debugsource
webkit2gtk3-soup2-minibrowser
webkit-jsc-4.1-debuginfo
webkit2gtk (Debian package)

Install update from vendor's website.

macOS - update to 26.5 25F71
webkit2gtk3 (Red Hat package) - addressed in versions 2.52.4-1.el8_4, 2.52.4-1.el8_6, 2.52.4-1.el8_8, 2.52.4-1.el8_10, 2.52.4-1.el9_2, 2.52.4-1.el9_4, 2.52.4-1.el9_6, 2.52.4-1.el9_8
webkitgtk - update to 2.52.4-1.fc43
webkit2gtk3-jsc-devel - update to 2.52.4-1.0.1
webkit2gtk3-jsc - update to 2.52.4-1.0.1
webkit2gtk3-devel - update to 2.52.4-1.0.1
webkit2gtk3 - update to 2.52.4-1.0.1
typelib-1_0-WebKit2WebExtension-4_0 - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk-4_0-injected-bundles-debuginfo - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk3-lang - update to 2.52.4-4.60.2
webkit2gtk3-devel - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk3-debugsource - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_0-37 - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
typelib-1_0-JavaScriptCore-4_0 - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
typelib-1_0-WebKit2-4_0 - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk-4_0-injected-bundles - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_0-37-debuginfo - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_0-18-debuginfo - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_0-18 - addressed in versions 2.52.4-4.60.2, 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
typelib-1_0-WebKit-6_0 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_1-0-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit-jsc-6.0-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk4-devel - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit-jsc-4.1 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit-jsc-4 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
typelib-1_0-WebKitWebProcessExtension-6_0 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk3-soup2-debugsource - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk4-minibrowser - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkitgtk-6_0-injected-bundles-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk3-minibrowser - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_1-0 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit-jsc-6.0 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
typelib-1_0-WebKit2-4_1 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkitgtk-6_0-4-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk3-soup2-minibrowser-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
typelib-1_0-WebKit2WebExtension-4_1 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk-4_1-injected-bundles - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-6_0-1 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_1-0-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_0-37-32bit - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_1-0-64bit - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_1-0-64bit-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_0-37-64bit - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_1-0-64bit-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_0-18-64bit-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_0-37-64bit-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_0-18-64bit - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_1-0-64bit - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_1-0-32bit-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_1-0-32bit - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_1-0-32bit - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_1-0-32bit-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_0-18-32bit-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_0-37-32bit-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-4_0-18-32bit - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkit2gtk-4_1-0 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk3-soup2-devel - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
typelib-1_0-JavaScriptCore-6_0 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk3-minibrowser-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
typelib-1_0-JavaScriptCore-4_1 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libwebkitgtk-6_0-4 - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk4-minibrowser-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk-4_1-injected-bundles-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
WebKitGTK-4.1-lang - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
WebKitGTK-4.0-lang - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
WebKitGTK-6.0-lang - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit-jsc-4-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkitgtk-6_0-injected-bundles - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
libjavascriptcoregtk-6_0-1-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk4-debugsource - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk3-soup2-minibrowser - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit-jsc-4.1-debuginfo - addressed in versions 2.52.4-150400.4.143.1, 2.52.4-150600.12.68.1
webkit2gtk (Debian package) - update to 2.52.5-1~deb13u1

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

• Multiple vulnerabilities in WebKitGTK+ and WPE WebKit
• Multiple vulnerabilities in Apple macOS Tahoe
• Fedora 43 update for webkitgtk
• SUSE update for webkit2gtk3
• SUSE update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• SUSE update for webkit2gtk3
• Anolis OS update for webkit2gtk3
• Debian update for webkit2gtk