In Eclipse Milo versions 1.0.0 through 1.1.4, "OpcUaServerConfig.copy()" fails to preserve a configured "RoleMapper". On servers that rely on role permissions and construct the running configuration through "copy()", sessions receive no role IDs and the default access controller skips role-permission checks, allowing an anonymous client where anonymous sessions are permitted to read role-permission metadata, invoke protected methods, or delete protected nodes.