Without logging in or when logged out, if you go to https://your.domain:8090/base/versionManagment, CP appears to provide a long page of server details with title " KeyError at /base/versionManagment". This appears to be a potential security issue.
Note: this occurs on vs 2.3.5 x64 and ARM Ubuntu 22.04. 2.3.4 does not and redirects to the login page as you would expect so looks like the issue occurs with the control panel update option.
@UsmanNasir can you check and confirm please.