---
title: "14.3 Changes"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:changelog-14-3"
source: "Changelog/14.3/Index.rst"
modified: "2026-09-15T10:46:36+00:00"
noindex: true
---

# 14.3 Changes

**Table of contents**

-   [Breaking Changes](https://docs.typo3.org/permalink/changelog:breaking-changes)
-   [Features](https://docs.typo3.org/permalink/changelog:features)
-   [Deprecation](https://docs.typo3.org/permalink/changelog:deprecation)
-   [Important](https://docs.typo3.org/permalink/changelog:important)

## Breaking Changes

None since TYPO3 v14.0 release.

> [!WARNING]
> **Attention**
>
> After TYPO3 v14.0, only new functionality with a solid migration path
> can be added on top, with aiming for as little as possible breaking changes
> after the initial v14.0 release on the way to LTS.

## Features

## Deprecation

-   [Deprecation: #107931 - Lowlevel DatabaseIntegrityCheck class](https://docs.typo3.org/permalink/changelog:deprecation-107931-lowlevel-databaseintegritycheck-class)
-   [Deprecation: #109107 - CacheAction key "href"](https://docs.typo3.org/permalink/changelog:deprecation-109107-cacheaction-key-href)
-   [Deprecation: #109438 - ext_tables.php in extensions](https://docs.typo3.org/permalink/changelog:deprecation-109438-ext-tables-php-in-extensions)
-   [Deprecation: #109517 - PSR-14 event \TYPO3\CMS\Setup\Event\AddJavaScriptModulesEvent](https://docs.typo3.org/permalink/changelog:deprecation-109517-psr-14-event-php-typo3-cms-setup-event-addjavascriptmodulesevent)
-   [Deprecation: #109519 - BackendUtility item list label methods](https://docs.typo3.org/permalink/changelog:deprecation-109519-backendutility-item-list-label-methods)
-   [Deprecation: #109523 - GeneralUtility::isOnCurrentHost() without PSR-7 request](https://docs.typo3.org/permalink/changelog:deprecation-109523-generalutility-isoncurrenthost-without-psr-7-request)
-   [Deprecation: #109529 - Page module section markup events](https://docs.typo3.org/permalink/changelog:deprecation-109529-page-module-section-markup-events)
-   [Deprecation: #109544 - GeneralUtility::sanitizeLocalUrl() needs PSR-7 request](https://docs.typo3.org/permalink/changelog:deprecation-109544-generalutility-sanitizelocalurl-needs-psr-7-request)
-   [Deprecation: #109548 - GeneralUtility::locationHeaderUrl() without PSR-7 request](https://docs.typo3.org/permalink/changelog:deprecation-109548-generalutility-locationheaderurl-without-psr-7-request)
-   [Deprecation: #109551 - GeneralUtility::getIndpEnv()](https://docs.typo3.org/permalink/changelog:deprecation-109551-generalutility-getindpenv)
-   [Deprecation: #109575 - Various ContentObjectRenderer properties/methods](https://docs.typo3.org/permalink/changelog:deprecation-109575-various-contentobjectrenderer-properties-methods)

## Important

-   [Important: #109107 - Cache action endpoints should return JSON response](https://docs.typo3.org/permalink/changelog:important-109107-cache-action-endpoints-should-return-json-response)
-   [Important: #109517 - Setup extension merged into backend extension](https://docs.typo3.org/permalink/changelog:important-109517-setup-extension-merged-into-backend-extension)
-   [Important: #109585 - Serialized Credential Data in be_users settings](https://docs.typo3.org/permalink/changelog:important-109585-serialized-credential-data-in-be-users-settings)