Misreading
Misread
noun
When you read something in a different way from the way you're supposed to it's a misreading.
This word can also be used figuratively, like when you misread a situation or someone’s intentions, and your expectations turn out to be incorrect.
Note that 読み間違い can also be used to mean the same thing.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
今日、超恥ずかしい読み違いをしてしまった。
I made the most embarrassing reading mistake today.