While the codebase does a great job of input validation for parameters of all kinds (especially addresses), there are a few places where zero-address validations are missing. Even though none of them are catastrophic, resulting in obvious reverts, and can be reset given the permissioned/controlled interactions with the contracts. Nevertheless, it is helpful to add zero-address validations to be consistent and ensure the high availability of the protocol with resistance to accidental misconfigurations. See the issue page for more details.
albertocuestacanada (Yield) confirmed but disputed severity:
