It's not a bug, it's a feature
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Mimolette is the cheese with bugs. (Well actually actually arachnids, but close enough)
What you're looking for is called Cazu Marzu, and it's illegal to sell it in most of the only region of the world that actually makes the stuff.
Based on what I can find, they are microscopic mites. You also have microscopic mites all over your face that you probably ingest at some point or another... So it's really not that weird.
The bugs living on the cheese are called "artisons" in France. https://fr.wikipedia.org/wiki/Fromage_aux_artisons?wprov=sfla1