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Ubuntu 26.04 WebKitGTK Important Remote Code Exec DoS USN-8237-1

ubuntu
Calendar Grey May 6, 2026
Dist Ubuntu Esm H88
Fix multiple security issues in WebKitGTK impacting Ubuntu. Key updates and fix guidance available now.
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%20covered

Topics Covered

security advisory denial of service remote code execution Ubuntu important webkitgtk

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

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8237-1

Topics%20covered

Topics Covered

security advisory denial of service remote code execution Ubuntu important webkitgtk

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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