Images Overflowing Cards

[MaggieAppleton]

Right now all the thumbnail images on the content cards overflow their containers when you resize the page / on certain screen sizes:

Can't figure out how to fix it – need to be able to keep the images contained within the cards no matter the card size.
We tried out making the cards taller in the past as a hack, but the spacing gets super awkward and want to figure out what's causing the overflow instead of working around it.