Cloudfare has advised that Wave data has not been affected/leaked. We've got engineering and security teams investigating, and we'll keep on it until we're ultra confident in the conclusion. Nonetheless, good practice for everyone to rotate all passwords today, for any services. Good security hygiene any time, and especially now.
Not 100% sure what their methodology is yet, and we're taking a cautious approach. At minimum, in the data that they've found in the wild, no Wave data was among it.