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[USN-7941-1] WebKitGTK vulnerabilities

Posted on 05 January 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7941-1
January 05, 2026

webkit2gtk vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in WebKitGTK.

Software Description:
- webkit2gtk: Web content engine library for GTK+

Details:

Several security issues were discovered in the WebKitGTK Web and JavaScript
engines. If a user were tricked into viewing a malicious website, a remote
attacker could exploit a variety of issues related to web browser security,
including cross-site scripting attacks, denial of service attacks, and
arbitrary code execution.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
libjavascriptcoregtk-4.1-0 2.50.3-0ubuntu0.25.10.1
libjavascriptcoregtk-6.0-1 2.50.3-0ubuntu0.25.10.1
libwebkit2gtk-4.1-0 2.50.3-0ubuntu0.25.10.1
libwebkitgtk-6.0-4 2.50.3-0ubuntu0.25.10.1

Ubuntu 25.04
libjavascriptcoregtk-4.1-0 2.50.3-0ubuntu0.25.04.1
libjavascriptcoregtk-6.0-1 2.50.3-0ubuntu0.25.04.1
libwebkit2gtk-4.1-0 2.50.3-0ubuntu0.25.04.1
libwebkitgtk-6.0-4 2.50.3-0ubuntu0.25.04.1

Ubuntu 24.04 LTS
libjavascriptcoregtk-4.1-0 2.50.3-0ubuntu0.24.04.1
libjavascriptcoregtk-6.0-1 2.50.3-0ubuntu0.24.04.1
libwebkit2gtk-4.1-0 2.50.3-0ubuntu0.24.04.1
libwebkitgtk-6.0-4 2.50.3-0ubuntu0.24.04.1

Ubuntu 22.04 LTS
libjavascriptcoregtk-4.0-18 2.50.3-0ubuntu0.22.04.1
libjavascriptcoregtk-4.1-0 2.50.3-0ubuntu0.22.04.1
libjavascriptcoregtk-6.0-1 2.50.3-0ubuntu0.22.04.1
libwebkit2gtk-4.0-37 2.50.3-0ubuntu0.22.04.1
libwebkit2gtk-4.1-0 2.50.3-0ubuntu0.22.04.1
libwebkitgtk-6.0-4 2.50.3-0ubuntu0.22.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK, such as Epiphany, to make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7941-1
CVE-2025-13947, CVE-2025-43421, CVE-2025-43458, CVE-2025-66287

Package Information:
https://launchpad.net/ubuntu/+source/webkit2gtk/2.50.3-0ubuntu0.25.10.1
https://launchpad.net/ubuntu/+source/webkit2gtk/2.50.3-0ubuntu0.25.04.1
https://launchpad.net/ubuntu/+source/webkit2gtk/2.50.3-0ubuntu0.24.04.1
https://launchpad.net/ubuntu/+source/webkit2gtk/2.50.3-0ubuntu0.22.04.1

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