TYPO3 12.4.43—What’s Changed?

Released: February 20, 2026
Update type: Bugfix and maintenance release

TYPO3 12.4.43 is a maintenance release focusing on dependency updates and bug fixes. Notable improvements include ImageMagick 7 compatibility, security updates to third-party packages including psy/psysh and firebase/php-jwt, and various fixes to the CKEditor 5 integration and import/export functionality.

Security Fixes

  • Third-party package updates — Updated psy/psysh and other third-party packages to address known vulnerabilities.
  • UTF-8 handling in sudo mode — Fixed handling of invalid UTF-8 sequences in sudo mode session data to prevent potential security issues.

Editing & UX Improvements

  • CKEditor 5 regex replacement — Fixed capturing regexp replace functionality in CKEditor 5, improving text editing capabilities.

Backend & Administration

  • Import/Export command fix — Corrected the --exclude option in the impexp:export command, ensuring proper data exclusion during exports.
  • Locale dependencies — Fixed issues with locale handling when dependencies are involved.

Technical Changes

  • ImageMagick 7 compatibility — Added support for ImageMagick 7, ensuring image processing works with the latest version.
  • JWT library upgrade — Updated firebase/php-jwt to version 7.0 and allowed versions ^6.10.2||^7.0.2 for better compatibility.
  • Composer update — Updated composer/composer to v2.9.3 for improved dependency management.
  • PHPStan and PHPUnit updates — Updated development tools including PHPStan to v2.1.39 and PHPUnit to ^10.5.63.
  • Testing improvements — Disabled shared memory usage for Chrome testing images and improved file ending comparisons in image processing tests.