The class BackupDestination with function 'write' writes the backup file towards for example S3, but when f.e. S3MultipartUploadException occurs, the flysystem class returns 'false' instead of the exception. The backup is still marked as succesful.

I was able to confirm that os.Create() will happily follow symlinks.

Although standard tools like tar will not likely allow you to add two files with the same name to an archive file, it's certainly easy enough to do in code. This means that we need to add an additional check before writing to a destination to make sure that it's not a symlink outside of the destination.

The vulnerab