diff --git a/packages/nuxt/src/runtime/components/index.ts b/packages/nuxt/src/runtime/components/index.ts
index 61bde896c00..0f4326f7071 100644
--- a/packages/nuxt/src/runtime/components/index.ts
+++ b/packages/nuxt/src/runtime/components/index.ts
@@ -25,4 +25,5 @@ export {
   SignOutButton,
   SignInWithMetamaskButton,
   PricingTable,
+  UNSAFE_PortalProvider,
 } from '@clerk/vue';
diff --git a/packages/vue/src/components/ClerkHostRenderer.ts b/packages/vue/src/components/ClerkHostRenderer.ts
index e3e9f692837..a24afaf52cf 100644
--- a/packages/vue/src/components/ClerkHostRenderer.ts
+++ b/packages/vue/src/components/ClerkHostRenderer.ts
@@ -1,6 +1,7 @@
 import type { PropType } from 'vue';
 import { defineComponent, h, onUnmounted, ref, watch, watchEffect } from 'vue';
 
+import { usePortalRoot } from '../composables/usePortalRoot';
 import type { CustomPortalsRendererProps } from '../types';
 import { ClerkLoaded } from './controlComponents';
 
@@ -44,6 +45,7 @@ export const ClerkHostRenderer = defineComponent({
   },
   setup(props) {
     const portalRef = ref<HTMLDivElement | null>(null);
+    const getContainer = usePortalRoot();
     let isPortalMounted = false;
 
     watchEffect(() => {
@@ -52,11 +54,16 @@ export const ClerkHostRenderer = defineComponent({
         return;
       }
 
+      const propsWithContainer = {
+        ...props.props,
+        getContainer,
+      };
+
       if (props.mount) {
-        props.mount(portalRef.value, props.props);
+        props.mount(portalRef.value, propsWithContainer);
       }
       if (props.open) {
-        props.open(props.props);
+        props.open(propsWithContainer);
       }
       isPortalMounted = true;
     });
@@ -65,7 +72,11 @@ export const ClerkHostRenderer = defineComponent({
       () => props.props,
       newProps => {
         if (isPortalMounted && props.updateProps && portalRef.value) {
-          props.updateProps({ node: portalRef.value, props: newProps });
+          const propsWithContainer = {
+            ...newProps,
+            getContainer,
+          };
+          props.updateProps({ node: portalRef.value, props: propsWithContainer });
         }
       },
       { deep: true },
diff --git a/packages/vue/src/components/PortalProvider.ts b/packages/vue/src/components/PortalProvider.ts
new file mode 100644
index 00000000000..ec49c81c856
--- /dev/null
+++ b/packages/vue/src/components/PortalProvider.ts
@@ -0,0 +1,52 @@
+import { defineComponent, type PropType, provide } from 'vue';
+
+import { PortalInjectionKey } from '../keys';
+
+/**
+ * UNSAFE_PortalProvider allows you to specify a custom container for Clerk floating UI elements
+ * (popovers, modals, tooltips, etc.) that use portals.
+ *
+ * Only components within this provider will be affected. Components outside the provider
+ * will continue to use the default document.body for portals.
+ *
+ * This is particularly useful when using Clerk components inside external UI libraries
+ * like Reka UI Dialog, where portaled elements need to render within the dialog's
+ * container to remain interactable.
+ *
+ * @example
+ * ```vue
+ * <script setup>
+ * import { useTemplateRef } from 'vue';
+ * import { DialogContent } from 'reka-ui';
+ * import { UNSAFE_PortalProvider, UserButton } from '@clerk/vue';
+ *
+ * const dialogContentRef = useTemplateRef('dialogContentRef');
+ * </script>
+ *
+ * <template>
+ *   <DialogContent ref="dialogContentRef">
+ *     <UNSAFE_PortalProvider :getContainer="() => dialogContentRef?.$el">
+ *       <UserButton />
+ *     </UNSAFE_PortalProvider>
+ *   </DialogContent>
+ * </template>
+ * ```
+ */
+export const UNSAFE_PortalProvider = defineComponent({
+  name: 'UNSAFE_PortalProvider',
+  props: {
+    /**
+     * Function that returns the container element where portals should be rendered.
+     * This allows Clerk components to render inside external dialogs/popovers
+     * (e.g., Reka UI Dialog) instead of document.body.
+     */
+    getContainer: {
+      type: Function as PropType<() => HTMLElement | null>,
+      required: true,
+    },
+  },
+  setup(props, { slots }) {
+    provide(PortalInjectionKey, { getContainer: props.getContainer });
+    return () => slots.default?.();
+  },
+});
diff --git a/packages/vue/src/components/index.ts b/packages/vue/src/components/index.ts
index 65c8398137f..dd19fafc2bd 100644
--- a/packages/vue/src/components/index.ts
+++ b/packages/vue/src/components/index.ts
@@ -30,3 +30,4 @@ export { default as SignInButton } from './SignInButton.vue';
 export { default as SignUpButton } from './SignUpButton.vue';
 export { default as SignOutButton } from './SignOutButton.vue';
 export { default as SignInWithMetamaskButton } from './SignInWithMetamaskButton.vue';
+export { UNSAFE_PortalProvider } from './PortalProvider';
diff --git a/packages/vue/src/composables/__tests__/usePortalRoot.test.ts b/packages/vue/src/composables/__tests__/usePortalRoot.test.ts
new file mode 100644
index 00000000000..47f7d601a2e
--- /dev/null
+++ b/packages/vue/src/composables/__tests__/usePortalRoot.test.ts
@@ -0,0 +1,100 @@
+import { render } from '@testing-library/vue';
+import { describe, expect, it } from 'vitest';
+import { defineComponent, h } from 'vue';
+
+import { UNSAFE_PortalProvider } from '../../components/PortalProvider';
+import { usePortalRoot } from '../usePortalRoot';
+
+describe('usePortalRoot', () => {
+  it('returns getContainer from context when inside PortalProvider', () => {
+    const container = document.createElement('div');
+    const getContainer = () => container;
+
+    const TestComponent = defineComponent({
+      setup() {
+        const portalRoot = usePortalRoot();
+        return () => h('div', { 'data-testid': 'test' }, portalRoot() === container ? 'found' : 'not-found');
+      },
+    });
+
+    const { getByTestId } = render(h(UNSAFE_PortalProvider, { getContainer }, () => h(TestComponent)));
+
+    expect(getByTestId('test').textContent).toBe('found');
+  });
+
+  it('returns a function that returns null when outside PortalProvider', () => {
+    const TestComponent = defineComponent({
+      setup() {
+        const portalRoot = usePortalRoot();
+        return () => h('div', { 'data-testid': 'test' }, portalRoot() === null ? 'null' : 'not-null');
+      },
+    });
+
+    const { getByTestId } = render(TestComponent);
+
+    expect(getByTestId('test').textContent).toBe('null');
+  });
+
+  it('only affects components within the provider', () => {
+    const container = document.createElement('div');
+    const getContainer = () => container;
+
+    const InsideComponent = defineComponent({
+      setup() {
+        const portalRoot = usePortalRoot();
+        return () => h('div', { 'data-testid': 'inside' }, portalRoot() === container ? 'container' : 'null');
+      },
+    });
+
+    const OutsideComponent = defineComponent({
+      setup() {
+        const portalRoot = usePortalRoot();
+        return () => h('div', { 'data-testid': 'outside' }, portalRoot() === null ? 'null' : 'container');
+      },
+    });
+
+    const { getByTestId } = render({
+      components: { InsideComponent, OutsideComponent, UNSAFE_PortalProvider },
+      template: `
+        <OutsideComponent />
+        <UNSAFE_PortalProvider :getContainer="getContainer">
+          <InsideComponent />
+        </UNSAFE_PortalProvider>
+      `,
+      setup() {
+        return { getContainer };
+      },
+    });
+
+    expect(getByTestId('inside').textContent).toBe('container');
+    expect(getByTestId('outside').textContent).toBe('null');
+  });
+
+  it('supports nested providers with innermost taking precedence', () => {
+    const outerContainer = document.createElement('div');
+    const innerContainer = document.createElement('div');
+
+    const TestComponent = defineComponent({
+      setup() {
+        const portalRoot = usePortalRoot();
+        return () => h('div', { 'data-testid': 'test' }, portalRoot() === innerContainer ? 'inner' : 'outer');
+      },
+    });
+
+    const { getByTestId } = render({
+      components: { TestComponent, UNSAFE_PortalProvider },
+      template: `
+        <UNSAFE_PortalProvider :getContainer="() => outerContainer">
+          <UNSAFE_PortalProvider :getContainer="() => innerContainer">
+            <TestComponent />
+          </UNSAFE_PortalProvider>
+        </UNSAFE_PortalProvider>
+      `,
+      setup() {
+        return { outerContainer, innerContainer };
+      },
+    });
+
+    expect(getByTestId('test').textContent).toBe('inner');
+  });
+});
diff --git a/packages/vue/src/composables/index.ts b/packages/vue/src/composables/index.ts
index 9ca30fcc06c..7adac21c765 100644
--- a/packages/vue/src/composables/index.ts
+++ b/packages/vue/src/composables/index.ts
@@ -13,3 +13,5 @@ export { useSignUp } from './useSignUp';
 export { useSessionList } from './useSessionList';
 
 export { useOrganization } from './useOrganization';
+
+export { usePortalRoot } from './usePortalRoot';
diff --git a/packages/vue/src/composables/usePortalRoot.ts b/packages/vue/src/composables/usePortalRoot.ts
new file mode 100644
index 00000000000..03adf0cf453
--- /dev/null
+++ b/packages/vue/src/composables/usePortalRoot.ts
@@ -0,0 +1,19 @@
+import { inject } from 'vue';
+
+import { PortalInjectionKey } from '../keys';
+
+/**
+ * Composable to get the current portal root container.
+ * Returns the getContainer function from context if inside a PortalProvider,
+ * otherwise returns a function that returns null (default behavior).
+ */
+export const usePortalRoot = (): (() => HTMLElement | null) => {
+  const context = inject(PortalInjectionKey, null);
+
+  if (context && context.getContainer) {
+    return context.getContainer;
+  }
+
+  // Return a function that returns null when not inside a PortalProvider
+  return () => null;
+};
diff --git a/packages/vue/src/keys.ts b/packages/vue/src/keys.ts
index 7a5ca1f5d38..e012c639c3b 100644
--- a/packages/vue/src/keys.ts
+++ b/packages/vue/src/keys.ts
@@ -19,3 +19,7 @@ export const UserProfileInjectionKey = Symbol('UserProfile') as InjectionKey<{
 export const OrganizationProfileInjectionKey = Symbol('OrganizationProfile') as InjectionKey<{
   addCustomPage(params: AddCustomPagesParams): void;
 }>;
+
+export const PortalInjectionKey = Symbol('Portal') as InjectionKey<{
+  getContainer: () => HTMLElement | null;
+}>;