A flaw in the new Boeing 787 Dreamline passenger jet, due for release later this year, could expose its control systems to hacking. 

Documents from the US Federal Aviation Administration  reveal that the aircraft's networks could allow passengers to access control, navigation and communication systems.
Wired.com reports that the flaw is caused by the plane connecting its in-flights access system to its flight safety, control and navigation network, as well as its business and adminstrative-support network.
Apparently Boeing has developed a fix, which it will test soon.
It has issued assurances that there will be no vulnerabilities when the aircraft is delivered.