to cancel the card and dispute unauthorized charges.

Large-scale hacks of online retailers where databases of customer info are leaked [1].

Buying or selling credit card numbers with CVV codes is and falls under federal crimes like identity theft and wire fraud [1, 2]. Engaging in these activities—even just searching for them—exposes you to severe legal consequences and significant personal risk.

Use services like Privacy.com or your bank’s built-in feature to create "burner" card numbers for online shopping. If the site is hacked, that specific number is useless elsewhere.