diff --git a/packages/core/src/browser/cookie.ts b/packages/core/src/browser/cookie.ts
index 50e0212023..c531f6a9ed 100644
--- a/packages/core/src/browser/cookie.ts
+++ b/packages/core/src/browser/cookie.ts
@@ -6,6 +6,7 @@ import {
   generateUUID,
 } from '../tools/utils/stringUtils'
 import { buildUrl } from '../tools/utils/urlPolyfill'
+import { globalObject } from '../tools/globalObject'
 
 export interface CookieOptions {
   secure?: boolean
@@ -75,7 +76,14 @@ export function deleteCookie(name: string, options?: CookieOptions) {
  * https://web.dev/same-site-same-origin/#site
  */
 let getCurrentSiteCache: string | undefined
-export function getCurrentSite(hostname = location.hostname, referrer = document.referrer): string | undefined {
+export function getCurrentSite(
+  hostname = globalObject.location?.hostname ?? '',
+  referrer = typeof document !== 'undefined' ? document.referrer : ''
+): string | undefined {
+  // Cookie probing requires document.cookie, which is not available in Web Workers or Node.js
+  if (typeof document === 'undefined') {
+    return undefined
+  }
   if (getCurrentSiteCache === undefined) {
     const defaultHostName = getCookieDefaultHostName(hostname, referrer)
     if (defaultHostName) {
diff --git a/packages/core/src/domain/context/storeContextManager.ts b/packages/core/src/domain/context/storeContextManager.ts
index ff43259924..e265630438 100644
--- a/packages/core/src/domain/context/storeContextManager.ts
+++ b/packages/core/src/domain/context/storeContextManager.ts
@@ -16,6 +16,11 @@ export function storeContextManager(
   productKey: string,
   customerDataType: CustomerDataType
 ) {
+  // window and localStorage are not available in Web Workers or Node.js environments
+  if (typeof window === 'undefined' || typeof localStorage === 'undefined') {
+    return
+  }
+
   const storageKey = buildStorageKey(productKey, customerDataType)
 
   storageListeners.push(
diff --git a/packages/core/src/tools/utils/urlPolyfill.ts b/packages/core/src/tools/utils/urlPolyfill.ts
index 812b407bb7..b7206850a8 100644
--- a/packages/core/src/tools/utils/urlPolyfill.ts
+++ b/packages/core/src/tools/utils/urlPolyfill.ts
@@ -1,7 +1,7 @@
 import { globalObject } from '../globalObject'
 
 export function normalizeUrl(url: string) {
-  return buildUrl(url, location.href).href
+  return buildUrl(url, globalObject.location?.href).href
 }
 
 export function isValidUrl(url: string) {