diff --git a/core-web/libs/portlets/edit-ema/portlet/src/lib/dot-ema-shell/dot-ema-shell.component.spec.ts b/core-web/libs/portlets/edit-ema/portlet/src/lib/dot-ema-shell/dot-ema-shell.component.spec.ts
index d08e2a52073..ca7f26895ea 100644
--- a/core-web/libs/portlets/edit-ema/portlet/src/lib/dot-ema-shell/dot-ema-shell.component.spec.ts
+++ b/core-web/libs/portlets/edit-ema/portlet/src/lib/dot-ema-shell/dot-ema-shell.component.spec.ts
@@ -1251,6 +1251,14 @@ describe('DotEmaShellComponent', () => {
 
                 expect(currentUrl).toMatch(/^\//);
             });
+
+            it('should use page hostname when clientHost is not present', () => {
+                const seoParams = spectator.component['$seoParams']();
+
+                expect(seoParams.requestHostName).toBe(
+                    `${window.location.protocol}//${MOCK_RESPONSE_HEADLESS.site.hostname}`
+                );
+            });
         });
 
         describe('$errorDisplay computed property', () => {
diff --git a/core-web/libs/portlets/edit-ema/portlet/src/lib/dot-ema-shell/dot-ema-shell.component.ts b/core-web/libs/portlets/edit-ema/portlet/src/lib/dot-ema-shell/dot-ema-shell.component.ts
index 0099305c730..9bd258719b9 100644
--- a/core-web/libs/portlets/edit-ema/portlet/src/lib/dot-ema-shell/dot-ema-shell.component.ts
+++ b/core-web/libs/portlets/edit-ema/portlet/src/lib/dot-ema-shell/dot-ema-shell.component.ts
@@ -164,7 +164,10 @@ export class DotEmaShellComponent implements OnInit, OnDestroy {
     protected readonly $seoParams = computed<DotPageToolUrlParams>(() => {
         const url = sanitizeURL(this.uveStore.pageAsset()?.page?.pageURI);
         const currentUrl = url.startsWith('/') ? url : '/' + url;
-        const requestHostName = getRequestHostName(this.uveStore.pageParams());
+        const requestHostName = getRequestHostName(
+            this.uveStore.pageParams(),
+            this.uveStore.pageAsset()?.site?.hostname
+        );
 
         return {
             siteId: this.uveStore.pageAsset()?.site?.identifier,
diff --git a/core-web/libs/portlets/edit-ema/portlet/src/lib/utils/index.ts b/core-web/libs/portlets/edit-ema/portlet/src/lib/utils/index.ts
index 836bb87a0dc..aa7c50f1493 100644
--- a/core-web/libs/portlets/edit-ema/portlet/src/lib/utils/index.ts
+++ b/core-web/libs/portlets/edit-ema/portlet/src/lib/utils/index.ts
@@ -794,8 +794,21 @@ export const mapContainerStructureToArrayOfContainers = (containers: DotCMSPageA
  * @param {DotPageApiParams} params
  * @return {*}  {string}
  */
-export const getRequestHostName = (params: DotPageApiParams) => {
-    return params?.clientHost || window.location.origin;
+export const getRequestHostName = (params: DotPageApiParams, pageHostname?: string) => {
+    if (params?.clientHost) {
+        return params.clientHost;
+    }
+
+    if (pageHostname) {
+        try {
+            return new URL(pageHostname).origin;
+        } catch {
+            // Hostname can be provided without scheme (e.g. "siteb.example.com")
+            return `${window.location.protocol}//${pageHostname}`;
+        }
+    }
+
+    return window.location.origin;
 };
 
 /**
diff --git a/core-web/libs/portlets/edit-ema/portlet/src/lib/utils/utils.spec.ts b/core-web/libs/portlets/edit-ema/portlet/src/lib/utils/utils.spec.ts
index 77bf274f8ce..e326061a2b9 100644
--- a/core-web/libs/portlets/edit-ema/portlet/src/lib/utils/utils.spec.ts
+++ b/core-web/libs/portlets/edit-ema/portlet/src/lib/utils/utils.spec.ts
@@ -26,6 +26,7 @@ import {
     createFullURL,
     getDragItemData,
     createReorderMenuURL,
+    getRequestHostName,
     getOrientation,
     normalizeQueryParams,
     convertUTCToLocalTime,
@@ -1295,6 +1296,69 @@ describe('utils functions', () => {
         });
     });
 
+    describe('getRequestHostName', () => {
+        it('should return clientHost when it is provided', () => {
+            expect(
+                getRequestHostName({
+                    url: 'test',
+                    language_id: '1',
+                    [PERSONA_KEY]: DEFAULT_PERSONA.keyTag,
+                    clientHost: 'https://headless.example.com'
+                })
+            ).toBe('https://headless.example.com');
+        });
+
+        it('should build the host from page hostname when clientHost is missing', () => {
+            expect(
+                getRequestHostName(
+                    {
+                        url: 'test',
+                        language_id: '1',
+                        [PERSONA_KEY]: DEFAULT_PERSONA.keyTag
+                    },
+                    'siteb.example.com'
+                )
+            ).toBe(`${window.location.protocol}//siteb.example.com`);
+        });
+
+        it('should extract origin when page hostname is a full URL', () => {
+            expect(
+                getRequestHostName(
+                    {
+                        url: 'test',
+                        language_id: '1',
+                        [PERSONA_KEY]: DEFAULT_PERSONA.keyTag
+                    },
+                    'https://siteb.example.com/path'
+                )
+            ).toBe('https://siteb.example.com');
+        });
+
+        it('should prioritize clientHost over page hostname', () => {
+            expect(
+                getRequestHostName(
+                    {
+                        url: 'test',
+                        language_id: '1',
+                        [PERSONA_KEY]: DEFAULT_PERSONA.keyTag,
+                        clientHost: 'https://headless.example.com'
+                    },
+                    'siteb.example.com'
+                )
+            ).toBe('https://headless.example.com');
+        });
+
+        it('should fallback to window origin when neither clientHost nor page hostname is provided', () => {
+            expect(
+                getRequestHostName({
+                    url: 'test',
+                    language_id: '1',
+                    [PERSONA_KEY]: DEFAULT_PERSONA.keyTag
+                })
+            ).toBe(window.location.origin);
+        });
+    });
+
     describe('getDragItemData', () => {
         it('should return correct data for content-type', () => {
             const dataset = {