---
title: "TYPO3 12.4.51—What’s Changed?"
url: "https://b13.com/release-digests/v12/typo3-12451-whats-changed"
date: 2026-10-22
modified: 2026-10-22
lastUpdated: 2026-10-22
---

# TYPO3 12.4.51—What’s Changed?

TYPO3 12.4.51—What’s Changed?
===============================

Released: October 22, 2026
Update type: Bugfix and maintenance release

TYPO3 12.4.51 is a maintenance release that addresses SVG sanitization security concerns and improves the extension list display in the TYPO3 Extension Repository (TER). The release also includes updated Symfony dependencies for improved stability.

  Security Fixes
----------------

- **SVG sanitization improvements** — Inline SVG nodes are now properly sanitized through the public API to prevent potential security issues.

   Editing & UX Improvements
-------------------------------

No editing or UX changes in this release.

   Backend & Administration
------------------------------

- **Extended title support in TER** — The TYPO3 Extension Repository list now supports longer extension titles without truncation issues.

   Technical Changes
-------------------

- **Symfony dependencies updated** — All Symfony packages have been updated to their latest compatible versions for improved stability and security.

  - [Download TYPO3 12](https://get.typo3.org/version/12)
- [Official release announcement](https://news.typo3.com/article/typo3-14310-13437-12451-11556-and-10462-maintenance-releases-published)
- [Full changelog](https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog-12/Index.html)