I enabled the anonymous user and am able to get some cmis queries to work however some return empty result when I am not an authenticated user:

These work: http://myhost/nuxeo/atom/cmis/default/content/foreign_currency.jpg?id=eb51ba14-63e7-4467-9cb0-681532591780

http://myhost/nuxeo/atom/cmis/default/path?path=/default-domain/workspaces/...

This one returns the file only when logged in as an authenticated user.

http://myhost/nuxeo/atom/cmis/default/query?q=select+*+from+cmis:document+where+cmis:name='system-error_cardmsg.xml'&searchAllVersions=true