The primary difference is that JSON isn't considered executable-- at least not by any Java JSON libraries that I've seen; it's just data. (Yes, non-executable

The primary difference is that JSON isn't considered executable-- at least not by any Java JSON libraries that I've seen; it's just data. (Yes, non-executable data can still deliver a malicious payload, e.g. http://technet.microsoft.com/en-us/security/bulletin/ms04-028 http://technet.microsoft.com/en-us/security/bulletin/ms04-02.... It's just much less common-- presumably because it's a much smaller attack surface.)