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[USN-8237-1] WebKitGTK vulnerabilities

Posted on 06 May 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8237-1
May 06, 2026

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

- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 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 26.04 LTS
libjavascriptcoregtk-4.1-0 2.52.3-0ubuntu0.26.04.2
libjavascriptcoregtk-6.0-1 2.52.3-0ubuntu0.26.04.2
libwebkit2gtk-4.1-0 2.52.3-0ubuntu0.26.04.2
libwebkitgtk-6.0-4 2.52.3-0ubuntu0.26.04.2

Ubuntu 25.10
libjavascriptcoregtk-4.1-0 2.52.3-0ubuntu0.25.10.1
libjavascriptcoregtk-6.0-1 2.52.3-0ubuntu0.25.10.1
libwebkit2gtk-4.1-0 2.52.3-0ubuntu0.25.10.1
libwebkitgtk-6.0-4 2.52.3-0ubuntu0.25.10.1

Ubuntu 24.04 LTS
libjavascriptcoregtk-4.1-0 2.52.3-0ubuntu0.24.04.1
libjavascriptcoregtk-6.0-1 2.52.3-0ubuntu0.24.04.1
libwebkit2gtk-4.1-0 2.52.3-0ubuntu0.24.04.1
libwebkitgtk-6.0-4 2.52.3-0ubuntu0.24.04.1

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-8237-1
CVE-2025-43213, CVE-2025-43214, CVE-2025-43457, CVE-2025-43511,
CVE-2025-46299, CVE-2026-20608, CVE-2026-20635, CVE-2026-20636,
CVE-2026-20643, CVE-2026-20644, CVE-2026-20652, CVE-2026-20664,
CVE-2026-20665, CVE-2026-20676, CVE-2026-20691, CVE-2026-28857,
CVE-2026-28859, CVE-2026-28861, CVE-2026-28871

Package Information:
https://launchpad.net/ubuntu/+source/webkit2gtk/2.52.3-0ubuntu0.26.04.2
https://launchpad.net/ubuntu/+source/webkit2gtk/2.52.3-0ubuntu0.25.10.1
https://launchpad.net/ubuntu/+source/webkit2gtk/2.52.3-0ubuntu0.24.04.1

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