1. Install 'standard'
2. Create a custom module with hook_entity_field_access and let it return Access::forbidden for the 'field_image' field.
3. Create an 'article' and click save.
4. "Image field is required." shows, despite the fact that the field is not even accessible.
Other fields that are required but not accessible don't generate violations when empty but not accessible.
A similar issue for the media library was solved here: https://www.drupal.org/project/drupal/issues/3267401 🐛 Media library is showing 'is required message' while the user has no access to the field Fixed
The solution would be similar: check for #access in ManagedFile::validateManagedFile.
Write tests.
Needs work
11.0 🔥
Fixes are made on on 11.x (our main development branch) first, and are then back ported as needed according to our policies.