Provided are a method and apparatus for managing resource access privileges of an application in a Connected Limited Device Configuration (CLDC) Open Service Gateway Initiative (OSGi) environment. The method includes executing the application in a thread having a unique thread identifier, identifying the application by mapping the unique thread identifier with an application identifier from a mapping table, examining a security policy to determine the kind of resource access privileges the identified application has, and allowing or not allowing, according to the examination result, the application to access the resources. Accordingly, when an application tries to access resources in a device, access privileges of the application can be managed so that the application does not maliciously access the resources.