diff --git a/engines/dfc_provider/app/controllers/dfc_provider/supplied_products_controller.rb b/engines/dfc_provider/app/controllers/dfc_provider/supplied_products_controller.rb
index d4142f25d6..6d3dce2e58 100644
--- a/engines/dfc_provider/app/controllers/dfc_provider/supplied_products_controller.rb
+++ b/engines/dfc_provider/app/controllers/dfc_provider/supplied_products_controller.rb
@@ -14,7 +14,10 @@ module DfcProvider
 
       return head :bad_request unless supplied_product
 
-      variant = SuppliedProductBuilder.import_variant(supplied_product)
+      variant = SuppliedProductBuilder.import_variant(
+        supplied_product,
+        current_enterprise,
+      )
       product = variant.product
 
       if product.new_record?
diff --git a/engines/dfc_provider/app/services/supplied_product_builder.rb b/engines/dfc_provider/app/services/supplied_product_builder.rb
index 84b14f53af..835d08261d 100644
--- a/engines/dfc_provider/app/services/supplied_product_builder.rb
+++ b/engines/dfc_provider/app/services/supplied_product_builder.rb
@@ -23,8 +23,8 @@ class SuppliedProductBuilder < DfcBuilder
     )
   end
 
-  def self.import_variant(supplied_product)
-    product = referenced_spree_product(supplied_product)
+  def self.import_variant(supplied_product, supplier)
+    product = referenced_spree_product(supplied_product, supplier)
 
     if product
       Spree::Variant.new(
@@ -40,7 +40,7 @@ class SuppliedProductBuilder < DfcBuilder
     end
   end
 
-  def self.referenced_spree_product(supplied_product)
+  def self.referenced_spree_product(supplied_product, supplier)
     uri = supplied_product.spree_product_uri
     id = supplied_product.spree_product_id
 
@@ -51,9 +51,9 @@ class SuppliedProductBuilder < DfcBuilder
       # Check that the given URI points to us:
       return unless uri == urls.enterprise_url(route.merge(params))
 
-      Spree::Product.find(params["spree_product_id"])
+      supplier.supplied_products.find_by(id: params["spree_product_id"])
     elsif id.present?
-      Spree::Product.find(id)
+      supplier.supplied_products.find_by(id:)
     end
   end
 
diff --git a/engines/dfc_provider/spec/services/supplied_product_builder_spec.rb b/engines/dfc_provider/spec/services/supplied_product_builder_spec.rb
index f4e1518735..49e33e6885 100644
--- a/engines/dfc_provider/spec/services/supplied_product_builder_spec.rb
+++ b/engines/dfc_provider/spec/services/supplied_product_builder_spec.rb
@@ -145,7 +145,7 @@ describe SuppliedProductBuilder do
   end
 
   describe ".import_variant" do
-    let(:imported_variant) { builder.import_variant(supplied_product) }
+    let(:imported_variant) { builder.import_variant(supplied_product, supplier) }
     let(:supplied_product) do
       DfcProvider::SuppliedProduct.new(
         "https://example.net/tomato",
@@ -173,7 +173,7 @@ describe SuppliedProductBuilder do
     end
 
     context "with spree_product_id supplied" do
-      let(:imported_variant) { builder.import_variant(supplied_product) }
+      let(:imported_variant) { builder.import_variant(supplied_product, supplier) }
 
       let(:supplied_product) do
         DfcProvider::SuppliedProduct.new(
@@ -213,7 +213,7 @@ describe SuppliedProductBuilder do
     end
 
     context "with spree_product_uri supplied" do
-      let(:imported_variant) { builder.import_variant(supplied_product) }
+      let(:imported_variant) { builder.import_variant(supplied_product, supplier) }
       let(:product_type) { DfcLoader.connector.PRODUCT_TYPES.DRINK.SOFT_DRINK }
       let!(:new_taxon) {
         create(
@@ -286,7 +286,7 @@ describe SuppliedProductBuilder do
   end
 
   describe ".referenced_spree_product" do
-    let(:result) { builder.referenced_spree_product(supplied_product) }
+    let(:result) { builder.referenced_spree_product(supplied_product, supplier) }
     let(:supplied_product) do
       DfcProvider::SuppliedProduct.new(
         "https://example.net/tomato",
@@ -305,6 +305,15 @@ describe SuppliedProductBuilder do
       expect(result).to eq spree_product
     end
 
+    it "doesn't return a product of another enterprise" do
+      variant.save!
+      create(:product, id: 8, supplier: create(:enterprise))
+
+      supplied_product.spree_product_uri =
+        "http://test.host/api/dfc/enterprises/7?spree_product_id=8"
+      expect(result).to eq nil
+    end
+
     it "doesn't return a foreign product referenced by URI" do
       variant.save!
       supplied_product.spree_product_uri =