TYPO3 v15 dev-main snapshot ()

2026-08-10 22:31:09 +02:00
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+.. include:: /Includes.rst.txt
+
+.. _breaking-67546:
+
+=======================================================================
+Breaking: #67546 - Cleanup Flash message rendering in FlashMessageQueue
+=======================================================================
+
+See :issue:`67546`
+
+Description
+===========
+
+The rendering of flash messages has changed when using the view helper.
+Now the rendering output of  `\TYPO3\CMS\Core\Messaging\FlashMessageQueue::renderFlashMessages()`
+is adapted to being exactly the same.
+
+
+Impact
+======
+
+Extensions using the rendered output of `\TYPO3\CMS\Core\Messaging\FlashMessageQueue::renderFlashMessages()`
+and in addition using HTML tags in flash messages for styling purposes will get their HTML flash message output
+properly HTML encoded. Thus the HTML tags will be visible in the rendered flash message output.
+
+Since `\TYPO3\CMS\Backend\Template\DocumentTemplate` also uses this rendering type, modules using this class
+will also be affected.
+
+
+Affected Installations
+======================
+
+All extensions that use modules with `\TYPO3\CMS\Backend\Template\DocumentTemplate` or are using
+`\TYPO3\CMS\Core\Messaging\FlashMessageQueue::renderFlashMessages()` directly.
+
+
+Migration
+=========
+
+Remove all HTML from flash messages.
+
+
+.. index:: PHP-API, Backend