My inclination would be to replace the whole hose. Why introduce additional failure points along the way from the dishwasher drain to the sink drain?
To repair the existing hose, you can consider something like Rescue Tape, i.e. like this:
But, I'm not sure it would work on accordion pipe.
I presume you've been able to take off the kick-plate level panel to get a good view under there. If you haven't, you may be surprised how easy the dishwasher can be pulled out. It all depends on the plumbing. Also, look for a possible small bracket or two just under the counter lip that keep the dishwasher in place.