We all know that OWSM policies can’t be used when MTOM is enabled for the proxy services. Looking at the note ID 1347447.1, it seems that we don’t have OWSM support even for SOAP with Attachments (SwA) as well.
Following is the solution given in the metalink note.
Solution
Use WS-SecurityPolicy or policies packaged in WebLogic Server (see http://download.oracle.com/docs/cd/E14571_01/web.1111/e13713/message.htm ) instead of OWSM.
Support for MTOM and SwA assertions with OWSM will be introduced in OSB 12
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