CVE-2026-84719: Automation-controller: automation-controller: workflowjobtemplate /copy/ deep-copy sanitizer omits instance_groups authorization (instancegroup use_role bypass to control-plane)

A flaw was found in the Ansible Automation Platform automation-controller. When a WorkflowJobTemplate is copied, the deep-copy permission sanitizer validates only the inventory, unifiedjobtemplate, and credentials of each cloned node and fails to check the instancegroups (and executionenvironment and labels) that were preserved from the original. A user with organization workflow-admin permission but no role on the referenced instance groups can copy a workflow, become its administrator, and launch jobs pinned to instance groups they are not authorized to use — including the control-plane instance group — bypassing the InstanceGroup userole boundary and causing attacker-influenced automation to run in the control-plane execution context.