diff --git a/packages/vue-vuetify/src/complex/components/AdditionalProperties.vue b/packages/vue-vuetify/src/complex/components/AdditionalProperties.vue
index eade49467..83bae23e6 100644
--- a/packages/vue-vuetify/src/complex/components/AdditionalProperties.vue
+++ b/packages/vue-vuetify/src/complex/components/AdditionalProperties.vue
@@ -109,6 +109,7 @@ import {
 import {
   DispatchRenderer,
   JsonForms,
+  useAjv,
   useJsonForms,
   useJsonFormsControlWithDetail,
   useTranslator,
@@ -410,8 +411,8 @@ export default defineComponent({
       validationMode: parentValidationMode,
       i18n,
       middleware,
-      ajv,
     } = useJsonForms();
+    const ajv = useAjv();
 
     // if the new property name is not specified then hide any errors
     const validationMode = computed(() =>
diff --git a/packages/vue-vuetify/tests/unit/additional/AdditionalPropertiesAjv.spec.ts b/packages/vue-vuetify/tests/unit/additional/AdditionalPropertiesAjv.spec.ts
new file mode 100644
index 000000000..d99ae5a5e
--- /dev/null
+++ b/packages/vue-vuetify/tests/unit/additional/AdditionalPropertiesAjv.spec.ts
@@ -0,0 +1,43 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import { clearAllIds, createAjv } from '@jsonforms/core';
+import { markRaw } from 'vue';
+import { extendedVuetifyRenderers } from '../../../src';
+import { mountJsonForms } from '../util/util';
+
+// Check that `additionalProperties` reuses the parent form's AJV
+describe('AdditionalProperties nested AJV', () => {
+  // A map whose key `pattern` is legal only without the `u` flag
+  const schema = {
+    type: 'object' as const,
+    properties: {
+      secretFiles: {
+        type: 'object' as const,
+        additionalProperties: { type: 'string' as const },
+        propertyNames: {
+          pattern: '^"([^"$\\\\]|\\$(?!{)|\\\\.)*"$',
+        },
+      },
+    },
+  };
+  const uischema = { type: 'Control' as const, scope: '#' };
+
+  beforeEach(() => {
+    clearAllIds();
+  });
+
+  it('mounts a map whose key pattern is only valid without the `u` flag', () => {
+    // A parent form configured with `unicodeRegExp: false`
+    const ajv = markRaw(createAjv({ unicodeRegExp: false }));
+    expect(() =>
+      mountJsonForms(
+        { secretFiles: {} },
+        schema,
+        extendedVuetifyRenderers,
+        uischema,
+        undefined,
+        undefined,
+        ajv,
+      ),
+    ).not.toThrow();
+  });
+});
diff --git a/packages/vue-vuetify/tests/unit/util/TestComponent.vue b/packages/vue-vuetify/tests/unit/util/TestComponent.vue
index eda1f44f1..4f62fbdea 100644
--- a/packages/vue-vuetify/tests/unit/util/TestComponent.vue
+++ b/packages/vue-vuetify/tests/unit/util/TestComponent.vue
@@ -6,6 +6,7 @@
       :uischema="uischema"
       :renderers="renderers"
       :config="config"
+      :ajv="ajv"
       :i18n="i18n"
       @change="onChange"
     />
diff --git a/packages/vue-vuetify/tests/unit/util/util.ts b/packages/vue-vuetify/tests/unit/util/util.ts
index a5c677035..00c63a83f 100644
--- a/packages/vue-vuetify/tests/unit/util/util.ts
+++ b/packages/vue-vuetify/tests/unit/util/util.ts
@@ -4,6 +4,7 @@ import type {
   JsonSchema,
   UISchemaElement,
 } from '@jsonforms/core';
+import type Ajv from 'ajv';
 import { mount } from '@vue/test-utils';
 import TestComponent from './TestComponent.vue';
 import { createVuetify } from 'vuetify';
@@ -25,6 +26,7 @@ export const mountJsonForms = (
   uischema?: UISchemaElement,
   config?: any,
   i18n?: JsonFormsI18nState,
+  ajv?: Ajv,
 ) => {
   return mount(TestComponent, {
     global: {
@@ -37,6 +39,7 @@ export const mountJsonForms = (
       config,
       renderers: markRaw(renderers),
       i18n,
+      ajv,
     },
     attachTo: document.body,
   });