Resolves #46009. - [X] Changes file added for user-visible changes in `changes/`, `orbit/changes/` or `ee/fleetd-chrome/changes`. ## Testing - [X] Added/updated automated tests - [X] QA'd all new/changed functionality manually <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Bug Fixes** * Fixed permissions for host activity items by aligning serialized field names used by authorization rules, ensuring fleet-scoped users receive correct access rights when listing and reading host activities. * **Tests** * Added authorization tests validating host activity access control across user roles and team scopes, including denial cases for unauthorized and GitOps-scoped users, and verifying policy evaluation depends on correct serialized field naming. <!-- review_stack_entry_start --> [](https://app.coderabbit.ai/change-stack/fleetdm/fleet/pull/46203?utm_source=github_walkthrough&utm_medium=github&utm_campaign=change_stack) <!-- review_stack_entry_end --> <!-- end of auto-generated comment: release notes by coderabbit.ai -->