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Ubuntu Security Notice USN-8272-1
May 19, 2026

smarty3 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Smarty could be made to run malicious JavaScript in the user's browser if
it received specially crafted input.

Software Description:
- smarty3: The compiling PHP template engine

Details:

Takuya Aramaki discovered that Smarty did not properly escape JavaScript
code. An attacker could possibly use this issue to conduct a cross-site
scripting attack.

Update instructions:

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

Ubuntu 16.04 LTS
  smarty3                         3.1.21-1ubuntu1+esm2
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-8272-1
  CVE-2023-28447