The Mailer component in Evolution 2.26.1 and earlier uses world-readable permissions for the .evolution directory, and certain directories and files under .evolution/ related to local mail, which allows local users to obtain sensitive information by reading these files.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2009-1626
https://bugzilla.redhat.com/show_bug.cgi?id=498648
http://www.securityfocus.com/bid/34921
http://www.openwall.com/lists/oss-security/2009/05/12/6