Duplicate for #10237. We can reproduce this issue – thanks for notifying us about this severe issue. It looks like the codesigning security
entitlements are not properly applied by the Mac App Store download. We are in contact with Apple Developer Support to get a resolution as soon as possible. As a workaround, please download the version from cyberduck.io which is not affected. You can request a registration key from firstname.lastname@example.org.