if a gpg signature check fails, is it a correctness issue? a security issue? or both?
If you use RewriteCond as the basis of securing your website, that's a security issue for you.
If it's a security issue for a significant number of users, or if the documentation recommends using the directive for a security role, then it's also a security issue for the product itself.
Security becomes irrelevant if the whole Apache module is broken.