User blog comment:Legionwrex/How did Saren reach the Citadel?/@comment-3228423-20130507041453

Probably due to the "enhancements" Sovereign gave him. That should be more than enough to allow him to survive the transition in the Conduit.

I know this is a completely unrelated topic, but I think a more important question is that who tipped Cerberus off on the super top-secret krogan female and the even more top-secret turian bomb. Even though it would be more than safe to assume that it was the racist b*tch Linron, not once is it discussed, not even implied as to who done it.