Yes, that's correct, in theory BREACH can be used to target any sort of secret embedded in the body of an HTTP response. CSRF tokens are the most common type of

Yes, that's correct, in theory BREACH can be used to target any sort of secret embedded in the body of an HTTP response. CSRF tokens are the most common type of secret in that category, but there are others. However, we can't speak authoritatively to The Web or All Web Frameworks or anything, but we can advise our users on how they can protect themselves.