According to our Privacy Notice, your credentials are secured on our website and Zalando will never use them for any purpose.
If Google recommends changing your password on our website, this is not related to a Zalando -specific data breach. This is a Google Chrome feature that verifies if the password for all websites you log in to has been part of any known breach.
When you logged-in to our website, Google Chrome possibly noticed the password or username you used are potentially exposed in one of the known data breaches.
Please visit Google security blog for more information.