Preventing uncontrolled access to an execution environment of a first component object by a second component object. A system includes a memory area storing the first component object, the second component object, and one or more predefined properties associated with the second component object. The system comprises a processor configured to receive a request from the first component object stored in the memory area to create the second component object stored in the memory area. The first component object executes in a first execution environment and the request specifies a requested execution environment for the second component object. The processor is also configured for analyzing the predefined properties stored in the memory area to determine an execution environment privilege associated with the second component object. The processor is configured for granting the received request as a function of the determined execution environment privilege.