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Joomla 5.4.9 Known Issues

Last Updated: 29 September 2026

Joomla 5.4.9 was released on 29 September 2026.

#48527 – Web Services API PATCH requests fail​

Trying to update an item (for example, a banner or a user entry) via Web Services API fails with a fatal error.

The regression was introduced while porting security fixes to the Joomla 5.x branch. A required use statement was missing.

Resolution​

This issue will be resolved in Joomla 5.4.10.

Workaround (until Joomla 5.4.10)​

In file libraries/src/MVC/Controller/ApiController.php, add the following use statement:

use Doctrine\Inflector\InflectorFactory;