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[USN-8220-1] HtmlUnit vulnerability

Posted on 07 May 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8220-1
May 05, 2026

htmlunit vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

HtmlUnit could be made to run programs as your login if it
opened a malicious website.

Software Description:
- htmlunit: headless web browser written in Java

Details:

It was discovered that HtmlUnit was vulnerable to remote code execution
via XSLT when browsing an attacker-controlled webpage. An attacker could possibly use
this issue to execute arbitrary code in the context of the application using HtmlUnit.

Update instructions:

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

Ubuntu 18.04 LTS
libhtmlunit-java 2.8-3ubuntu1+esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libhtmlunit-java 2.8-1ubuntu2.1+esm1
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8220-1
CVE-2023-49093

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