are these marks visible on the film itself? this is not mechanical failure, either in the development or you have a dirty scanner, or your emulsion is a bit sketchy
bubbles and strange colors would be bad processing or bad film, or both.
In the second image there's a bit of lens flare, perhaps in the first also. That can be fixed partly by using a lens hood, and especially by not shooting into a strong light source.
No particular evidence of a light leak, judging from the second image, it's a little hard to tell in the first.