TYPO3 12.4.47—What’s Changed?

Released: June 16, 2026
Update type: Bugfix and maintenance release

TYPO3 12.4.47 is a maintenance release that addresses several bugfixes related to clipboard permissions, scheduler task serialization, and cache backend handling. This release includes improvements for PHP 8.3 compatibility and resolves issues that could affect backend workflows and system stability.

Security Fixes

No security fixes in this release.

Editing & UX Improvements

  • Clipboard permission handling — Fixed permission checks when working with clipboard functionality on the root page, preventing potential issues in page management workflows.

Backend & Administration

  • Scheduler task deserialization — Resolved an issue where scheduler tasks containing logger references could not be properly deserialized, ensuring scheduled tasks work reliably.

Technical Changes

  • Cache NullBackend optimization — Made the NullBackend cache implementation transient, improving memory efficiency and system performance.
  • PHP 8.3 compatibility — Silenced unserialize() warnings that appeared in PHP 8.3 and later versions, ensuring smooth operation on modern PHP releases.