Calm down, you don’t have to start disposing of all the peaches in your fridge or collecting them as ammunition for a potential zombie apocalypse. Yes, 100 g of moist peach seed contains 88 mg of cyanide. And yes, eating 100 g of peach seed wouldn’t be the safest thing to do.
However, one peach pit weighs only 10 grams. So, if you ate an entire pit (although, why would you?), You would only ingest 9mg of cyanide, and this cyanide would be in the form of amygdalin which is esteemed an anti-cancer drug. The actual pulp of the peach, assuming the seed isn’t cracked, contains virtually no cyanide.