PHP Warning: Undefined global variable $TYPO3_REQUEST in BackendUserAuthentication.php after container migration

[prdt3e]

Bug Report

Title: PHP Warning: Undefined global variable $TYPO3_REQUEST in BackendUserAuthentication.php after container migration

After running the upgrade step EXT:container: Migrate "container" sorting via the Install Tool, a PHP warning was triggered:

PHP Warning: Undefined global variable $TYPO3_REQUEST 
in vendor/typo3/cms-core/Classes/Authentication/BackendUserAuthentication.php line 1842
TYPO3\CMS\Core\Error\Exception thrown in
vendor/typo3/cms-core/Classes/Error/ErrorHandler.php line 141
Requested URL:
/typo3/install.php?install%5Bcontroller%5D=upgrade&install%5Bcontext%5D=

Steps to Reproduce

1. Open the Install Tool (/typo3/install.php)
2. Run the upgrade action: EXT:container: Migrate "container" sorting
3. Observe the PHP warning in the output or PHP error log.

Expected Behavior

No PHP warning should occur during or after the migration process.

Additional Context

• The warning occurred only when logged in via the Install Tool, not when logged in as a normal backend user.
• After logging into the backend normally, the issue did not occur again.
• It seems $GLOBALS['TYPO3_REQUEST'] is missing or uninitialized in the Install Tool execution context.
• Possibly related to code in BackendUserAuthentication that expects $TYPO3_REQUEST to be globally available.

Possible Cause / Suggestion

The Install Tool likely runs in a limited bootstrap context without initializing the global $TYPO3_REQUEST.
A null or fallback check could be added in BackendUserAuthentication before accessing the variable.

System Information

Component	Version
TYPO3	13.4.19
EXT:container	3.1.10
PHP	8.3.27

🏷️ Labels

bug typo3-13 container-extension install-tool

🧾 Notes

This issue only appears in Install Tool context and not in regular backend sessions, suggesting a missing initialization step or dependency during the upgrade routine.