---
title: "Feature: #93063 - FlashMessages are stored in session as JsonSerializable"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:feature-93063"
source: "Changelog/11.0/Feature-93063-FlashMessagesAreStoredInSessionAsJsonSerializable.rst"
modified: "2026-09-14T09:47:36+00:00"
---

# Feature: #93063 - FlashMessages are stored in session as JsonSerializable

See [forge#93063](https://forge.typo3.org/issues/93063)

## Description

FlashMessages which are used to show information across backend
modules and frontend plugins / forms, are mostly stored in the
session data of a user session.

They are now stored as json_encoded data, using the already existing
`JsonSerializable` functionality of AbstractMessage.

## Impact

This way, the FlashMessage objects are only built when they are
needed and not on every PHP call the user session is started,
making e.g. AJAX calls a tiny bit faster.