Ubuntu 25.10: Critical WebKitGTK Security Updates USN-7941-1 CVE-2025-13947

ubuntu

January 5, 2026

Several security issues were fixed in WebKitGTK.

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.

Topics Covered

security advisory denial of service cross site scripting Ubuntu important webkitgtk

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.