diff --git a/packages/kbn-securitysolution-lists-common/api/find_list/find_list.gen.ts b/packages/kbn-securitysolution-lists-common/api/find_list/find_list.gen.ts
index 22bd50fcf0f351..96fcaa5eefca45 100644
--- a/packages/kbn-securitysolution-lists-common/api/find_list/find_list.gen.ts
+++ b/packages/kbn-securitysolution-lists-common/api/find_list/find_list.gen.ts
@@ -24,7 +24,7 @@ export type FindListsCursor = z.infer<typeof FindListsCursor>;
 export const FindListsCursor = NonEmptyString;
 
 export type FindListsFilter = z.infer<typeof FindListsFilter>;
-export const FindListsFilter = NonEmptyString;
+export const FindListsFilter = z.string();
 
 export type FindListsRequestQuery = z.infer<typeof FindListsRequestQuery>;
 export const FindListsRequestQuery = z.object({
diff --git a/packages/kbn-securitysolution-lists-common/api/find_list/find_list.schema.yaml b/packages/kbn-securitysolution-lists-common/api/find_list/find_list.schema.yaml
index 7fa5f1ac581ac7..236fa747599ac1 100644
--- a/packages/kbn-securitysolution-lists-common/api/find_list/find_list.schema.yaml
+++ b/packages/kbn-securitysolution-lists-common/api/find_list/find_list.schema.yaml
@@ -116,4 +116,4 @@ components:
       $ref: '../../../kbn-openapi-common/schemas/primitives.schema.yaml#/components/schemas/NonEmptyString'
 
     FindListsFilter:
-      $ref: '../../../kbn-openapi-common/schemas/primitives.schema.yaml#/components/schemas/NonEmptyString'
+      type: string
diff --git a/packages/kbn-securitysolution-lists-common/api/find_list_item/find_list_item.gen.ts b/packages/kbn-securitysolution-lists-common/api/find_list_item/find_list_item.gen.ts
index ef23adf7a7dcdc..6288ece0cf179b 100644
--- a/packages/kbn-securitysolution-lists-common/api/find_list_item/find_list_item.gen.ts
+++ b/packages/kbn-securitysolution-lists-common/api/find_list_item/find_list_item.gen.ts
@@ -25,7 +25,7 @@ export type FindListItemsCursor = z.infer<typeof FindListItemsCursor>;
 export const FindListItemsCursor = NonEmptyString;
 
 export type FindListItemsFilter = z.infer<typeof FindListItemsFilter>;
-export const FindListItemsFilter = NonEmptyString;
+export const FindListItemsFilter = z.string();
 
 export type FindListItemsRequestQuery = z.infer<typeof FindListItemsRequestQuery>;
 export const FindListItemsRequestQuery = z.object({
diff --git a/packages/kbn-securitysolution-lists-common/api/find_list_item/find_list_item.schema.yaml b/packages/kbn-securitysolution-lists-common/api/find_list_item/find_list_item.schema.yaml
index 92dbc361b7ad2b..67df0f4e8d031b 100644
--- a/packages/kbn-securitysolution-lists-common/api/find_list_item/find_list_item.schema.yaml
+++ b/packages/kbn-securitysolution-lists-common/api/find_list_item/find_list_item.schema.yaml
@@ -122,4 +122,4 @@ components:
       $ref: '../../../kbn-openapi-common/schemas/primitives.schema.yaml#/components/schemas/NonEmptyString'
 
     FindListItemsFilter:
-      $ref: '../../../kbn-openapi-common/schemas/primitives.schema.yaml#/components/schemas/NonEmptyString'
+      type: string
diff --git a/x-pack/test/security_solution_api_integration/test_suites/lists_and_exception_lists/lists_items/trial_license_complete_tier/items/find_list_items.ts b/x-pack/test/security_solution_api_integration/test_suites/lists_and_exception_lists/lists_items/trial_license_complete_tier/items/find_list_items.ts
index aed7d61acf7b23..d7817ea86cd235 100644
--- a/x-pack/test/security_solution_api_integration/test_suites/lists_and_exception_lists/lists_items/trial_license_complete_tier/items/find_list_items.ts
+++ b/x-pack/test/security_solution_api_integration/test_suites/lists_and_exception_lists/lists_items/trial_license_complete_tier/items/find_list_items.ts
@@ -79,6 +79,28 @@ export default ({ getService }: FtrProviderContext): void => {
         });
       });
 
+      it('should accept empty string filter', async () => {
+        await supertest
+          .post(LIST_URL)
+          .set('kbn-xsrf', 'true')
+          .send(getCreateMinimalListSchemaMock())
+          .expect(200);
+
+        const { body } = await supertest
+          .get(`${LIST_ITEM_URL}/_find?list_id=${LIST_ID}&filter=`)
+          .set('kbn-xsrf', 'true')
+          .send()
+          .expect(200);
+
+        expect(body).toEqual({
+          cursor: 'WzBd',
+          data: [],
+          page: 1,
+          per_page: 20,
+          total: 0,
+        });
+      });
+
       it('should return a single list item when a single list item is loaded from a find with defaults added', async () => {
         const listMock = getCreateMinimalListSchemaMock();
         const listItemMock = getCreateMinimalListItemSchemaMock();