Luggage_isu 3.6.15-6.15 has been released (along with its upstream, Luggage 3.6.15).
This release incorporates Drupal 7.74 which addresses the following security advisory:
A full list of changes to Luggage_isu can be found in LUGGAGE_ISU_CHANGELOG.txt
The release is available at https://github.com/isubit/luggage_isu/releases/tag/6.15
A full list of changes to Luggage can be found in LUGGAGE_CHANGELOG.txt
The release is available at https://github.com/isubit/luggage/releases/tag/3.6.15