This is built into Apple/iOS. Its just letting you know that passwords you have saved have been possibly leaked. You just need to click on the notification and it will show you what passwords. Or you can go into Settings, Passwords, and look there.
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article