What is the weakest dragon in D&D?

White dragons White dragons are the weakest and the most feral of the classic chromatic dragons. Though dimmer than other dragons, they are still powerful enough to overwhelm most humans and have good long-term memories.

https://en.wikipedia.org/wiki/Dragon_(Dungeons_%26_Dragons)#:~:text=White%20dragons%20are%20the%20weakest,have%20good%20long%2Dterm%20memories.