Change Data Capture Developer Guide

Change Data Capture
Keep Your External Data Current with Change Data Capture
Subscribe to Change Events
Change Event Message Structure
Security Considerations
Required Permissions for Subscription
Field-Level Security
Change Events for Encrypted Salesforce Data
Change Event Considerations
Standard Object Notes
Sending Data Differences for Fields of Updated Records
Other Types of Change Events: Gap and Overflow Events
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Required Permissions for Subscription

Change Data Capture ignores sharing settings and sends change events for all records of a Salesforce object. To receive change events, the subscribed user must have one or more permissions depending on the channel that is subscribed to. The following table outlines the required permissions per channel.
Channel Required Permissions
/data/ChangeEvents View All Data AND View All Users
/data/UserChangeEvent View All Users
/data/<Standard_Object_Name>ChangeEvent

Or

/data/<Custom_Object_Name>__ChangeEvent 		View All for the object OR View All Data

Some standard objects don’t have the View All permission, such as Task and Event. In this case, the View All Data permission is required.

User permissions are enforced when the user subscribes to a channel. If the user has insufficient permissions, the user can’t subscribe to the channel, and an error is returned. For more information about user permissions, see View All and Modify All Permissions Overview in the Salesforce Help.