Universal cross-site scripting in WebKitGTK+ and WPE WebKit - CVE-2026-28871

Vulnerability identifier: #VU124405

CSH Severity: Medium

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:L/SA:N]

CVE-ID: CVE-2026-28871

CWE-ID: CWE-79

Exploitation vector: Remote access

Exploit availability: No public exploit available

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in WebKit. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of an arbitrary website.

WebKitGTK+
WPE WebKit
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
Red Hat Enterprise Linux for ARM 64
Anolis OS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_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
Development Tools Module
Desktop Applications Module
Basesystem Module
openSUSE Leap
Apple iOS
iPadOS
Ubuntu
macOS
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
webkit2gtk (Debian package)
libjavascriptcoregtk-4_0-18
libwebkit2gtk3-lang
webkit2gtk-4_0-injected-bundles-debuginfo
libwebkit2gtk-4_0-37-debuginfo
webkit2gtk-4_0-injected-bundles
libwebkit2gtk-4_0-37
libjavascriptcoregtk-4_0-18-debuginfo
typelib-1_0-WebKit2WebExtension-4_0
webkit2gtk3-devel
typelib-1_0-JavaScriptCore-4_0
typelib-1_0-WebKit2-4_0
webkit2gtk3-debugsource
webkit2gtk3-soup2-minibrowser
libwebkitgtk-6_0-4-debuginfo
webkit2gtk4-debugsource
webkit2gtk4-devel
webkit-jsc-4
webkit2gtk3-soup2-minibrowser-debuginfo
typelib-1_0-JavaScriptCore-6_0
webkit2gtk-4_1-injected-bundles-debuginfo
typelib-1_0-JavaScriptCore-4_1
libjavascriptcoregtk-4_1-0
libjavascriptcoregtk-6_0-1
typelib-1_0-WebKit2WebExtension-4_1
libjavascriptcoregtk-4_1-0-debuginfo
libjavascriptcoregtk-4_1-0-32bit-debuginfo
webkit2gtk4-minibrowser
webkit-jsc-4-debuginfo
WebKitGTK-4.0-lang
WebKitGTK-6.0-lang
WebKitGTK-4.1-lang
libwebkit2gtk-4_0-37-32bit
libwebkit2gtk-4_0-37-64bit
libwebkit2gtk-4_0-37-64bit-debuginfo
libjavascriptcoregtk-4_0-18-64bit-debuginfo
libjavascriptcoregtk-4_1-0-64bit
libwebkit2gtk-4_1-0-64bit-debuginfo
libwebkit2gtk-4_1-0-64bit
libjavascriptcoregtk-4_1-0-64bit-debuginfo
libjavascriptcoregtk-4_0-18-64bit
webkitgtk-6_0-injected-bundles-debuginfo
libjavascriptcoregtk-4_1-0-32bit
libwebkit2gtk-4_1-0-32bit-debuginfo
libjavascriptcoregtk-4_0-18-32bit
libwebkit2gtk-4_1-0-32bit
libjavascriptcoregtk-4_0-18-32bit-debuginfo
libwebkit2gtk-4_0-37-32bit-debuginfo
webkit-jsc-6.0
webkit2gtk3-soup2-devel
webkit2gtk3-minibrowser-debuginfo
webkit-jsc-4.1
webkit2gtk3-minibrowser
typelib-1_0-WebKitWebProcessExtension-6_0
libjavascriptcoregtk-6_0-1-debuginfo
webkit-jsc-4.1-debuginfo
webkit-jsc-6.0-debuginfo
webkit2gtk3-soup2-debugsource
libwebkitgtk-6_0-4
libwebkit2gtk-4_1-0
webkit2gtk4-minibrowser-debuginfo
libwebkit2gtk-4_1-0-debuginfo
webkit2gtk-4_1-injected-bundles
typelib-1_0-WebKit2-4_1
typelib-1_0-WebKit-6_0
webkitgtk-6_0-injected-bundles
webkit2gtk3 (Red Hat package)
webkit2gtk (Ubuntu package)
webkitgtk4 (Red Hat package)
webkit2gtk3
webkit2gtk3-jsc-devel
webkit2gtk3-jsc
Apple Safari

Install updates from vendor's website.

WebKitGTK+ - update to 2.52.1
WPE WebKit - update to 2.52.1
Apple iOS - addressed in versions 18.7.7 22H333, 26.4 23E246
iPadOS - addressed in versions 18.7.7 22H333, 26.4 23E246
macOS - update to 26.4 25E246
Apple Safari - update to 26.4
webkit2gtk (Debian package) - update to 2.52.1-1~deb13u1
libjavascriptcoregtk-4_0-18 - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk3-lang - update to 2.52.1-4.57.1
webkit2gtk-4_0-injected-bundles-debuginfo - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-debuginfo - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk-4_0-injected-bundles - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37 - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-debuginfo - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
typelib-1_0-WebKit2WebExtension-4_0 - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk3-devel - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
typelib-1_0-JavaScriptCore-4_0 - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
typelib-1_0-WebKit2-4_0 - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk3-debugsource - addressed in versions 2.52.1-4.57.1, 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk3-soup2-minibrowser - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkitgtk-6_0-4-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk4-debugsource - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk4-devel - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit-jsc-4 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk3-soup2-minibrowser-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
typelib-1_0-JavaScriptCore-6_0 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk-4_1-injected-bundles-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
typelib-1_0-JavaScriptCore-4_1 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-6_0-1 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
typelib-1_0-WebKit2WebExtension-4_1 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-32bit-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk4-minibrowser - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit-jsc-4-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
WebKitGTK-4.0-lang - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
WebKitGTK-6.0-lang - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
WebKitGTK-4.1-lang - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-32bit - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-64bit - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-64bit-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-64bit-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-64bit - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-64bit-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-64bit - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-64bit-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-64bit - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkitgtk-6_0-injected-bundles-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-32bit - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-32bit-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-32bit - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-32bit - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-32bit-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-32bit-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit-jsc-6.0 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk3-soup2-devel - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk3-minibrowser-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit-jsc-4.1 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk3-minibrowser - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
typelib-1_0-WebKitWebProcessExtension-6_0 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libjavascriptcoregtk-6_0-1-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit-jsc-4.1-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit-jsc-6.0-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk3-soup2-debugsource - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkitgtk-6_0-4 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk4-minibrowser-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-debuginfo - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk-4_1-injected-bundles - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
typelib-1_0-WebKit2-4_1 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
typelib-1_0-WebKit-6_0 - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkitgtk-6_0-injected-bundles - addressed in versions 2.52.1-150400.4.140.2, 2.52.1-150600.12.63.1
webkit2gtk3 (Red Hat package) - addressed in versions 2.52.3-0.el9_7.1, 2.52.3-1.el8_4, 2.52.3-1.el8_6, 2.52.3-1.el8_8, 2.52.3-1.el8_10, 2.52.3-1.el9_0, 2.52.3-1.el9_2, 2.52.3-1.el9_4, 2.52.3-1.el9_6
webkit2gtk (Ubuntu package) - addressed in versions 2.52.3-0ubuntu0.24.04.1, 2.52.3-0ubuntu0.25.10.1, 2.52.3-0ubuntu0.26.04.2
webkitgtk4 (Red Hat package) - update to 2.52.3-1.el7_9
webkit2gtk3 - update to 2.52.3-1.0.1
webkit2gtk3-jsc-devel - update to 2.52.3-1.0.1
webkit2gtk3-jsc - update to 2.52.3-1.0.1
webkit2gtk3-devel - update to 2.52.3-1.0.1

• https://support.apple.com/en-us/126794
• https://webkitgtk.org/security/WSA-2026-0002.html

• Multiple vulnerabilities in WebKitGTK+ and WPE WebKit
• Multiple vulnerabilities in Apple macOS Tahoe
• Multiple vulnerabilities in Apple Safari
• Multiple vulnerabilities in Apple iOS 18 and iPadOS 18
• Multiple vulnerabilities in Apple iOS 26 and iPadOS 26
• SUSE update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• SUSE 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
• Ubuntu update for webkit2gtk
• SUSE update for webkit2gtk3
• Anolis OS update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Debian update for webkit2gtk
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 7 Extended Lifecycle Support update for webkitgtk4