I work on a Mac and received a message from the OS that says "Creative Cloud helper wants to use the local items keychain".
It turns out that the local items keychain contains many passwords, that can be synced with iCloud. In my understanding, granting access would allow Adobe to read a lot of passwords that have nothing to do with Adobe products.
So, my question is: why Adobe wants access to all my passwords?
When you use Xcode to create an application, Xcode adds an application-identifier entitlement to the application bundle. Keychain Services uses this entitlement to grant the application access to its own keychain items.
This seems to happen if you quit the Creative Cloud app from the top menu bar tool icon. Apparently not all the CC processes exit. This helper process must normally request access from the Creative Cloud app, which caches access when you boot the system or restart that program. I'd guess that when it fails to get the credential from the CC app, it defaults to prompting the user.