diff --git a/packages/@sanity/cli/src/actions/init-project/bootstrapRemoteTemplate.ts b/packages/@sanity/cli/src/actions/init-project/bootstrapRemoteTemplate.ts
index 977746a7ea3..611cfdea1f3 100644
--- a/packages/@sanity/cli/src/actions/init-project/bootstrapRemoteTemplate.ts
+++ b/packages/@sanity/cli/src/actions/init-project/bootstrapRemoteTemplate.ts
@@ -13,12 +13,14 @@ import {
   generateSanityApiReadToken,
   getPackages,
   type RepoInfo,
+  setCorsOrigin,
   tryApplyPackageName,
   validateRemoteTemplate,
 } from '../../util/remoteTemplate'
 import {type GenerateConfigOptions} from './createStudioConfig'
 import {tryGitInit} from './git'
 import {updateInitialTemplateMetadata} from './updateInitialTemplateMetadata'
+import {getDefaultPortForFramework} from '../../util/frameworkPort'
 
 export interface BootstrapRemoteOptions {
   outputPath: string
@@ -65,7 +67,12 @@ export async function bootstrapRemoteTemplate(
       fs: new LocalFileSystemDetector(packagePath),
       frameworkList: frameworks as readonly Framework[],
     })
-    // Next.js uses `.env.local` for local environment variables
+    const port = getDefaultPortForFramework(packageFramework?.slug)
+
+    debug('Setting CORS origin to http://localhost:%d', port)
+    await setCorsOrigin(`http://localhost:${port}`, variables.projectId, apiClient)
+
+    debug('Applying environment variables to %s', pkg)
     const envName = packageFramework?.slug === 'nextjs' ? '.env.local' : '.env'
     await applyEnvVariables(packagePath, {...variables, readToken}, envName)
   }
diff --git a/packages/@sanity/cli/src/util/frameworkPort.ts b/packages/@sanity/cli/src/util/frameworkPort.ts
new file mode 100644
index 00000000000..b8609f0d56c
--- /dev/null
+++ b/packages/@sanity/cli/src/util/frameworkPort.ts
@@ -0,0 +1,63 @@
+const FALLBACK_PORT = 3000
+
+const portMap: Record<string, number> = {
+  'nextjs': 3000,
+  'blitzjs': 3000,
+  'gatsby': 8000,
+  'remix': 3000,
+  'astro': 3000,
+  'hexo': 4000,
+  'eleventy': 8080,
+  'docusaurus': 3000,
+  'docusaurus-2': 3000,
+  'preact': 8080,
+  'solidstart': 3000,
+  'solidstart-1': 3000,
+  'dojo': 3000,
+  'ember': 4200,
+  'vue': 8080,
+  'scully': 1668,
+  'ionic-angular': 4200,
+  'angular': 4200,
+  'polymer': 8081,
+  'svelte': 5000,
+  'sveltekit': 5173,
+  'sveltekit-1': 5173,
+  'ionic-react': 3000,
+  'create-react-app': 3000,
+  'gridsome': 8080,
+  'umijs': 8000,
+  'saber': 3000,
+  'stencil': 3333,
+  'nuxtjs': 3000,
+  'redwoodjs': 8910,
+  'hugo': 1313,
+  'jekyll': 4000,
+  'brunch': 3333,
+  'middleman': 4567,
+  'zola': 1111,
+  'hydrogen': 3000,
+  'vite': 5173,
+  'vitepress': 5173,
+  'vuepress': 8080,
+  'parcel': 1234,
+  'fasthtml': 8000,
+  'sanity': 3333,
+  'sanity-v3': 3333,
+  'storybook': 6006,
+}
+
+/**
+ * Returns the default development port for a given framework.
+ * Contains default ports for all frameworks supported by `@vercel/frameworks`.
+ * Falls back to port 3000 if framework is not found or not specified.
+ *
+ * @see https://github.com/vercel/vercel/blob/main/packages/frameworks/src/frameworks.ts
+ * for the complete list of supported frameworks
+ *
+ * @param frameworkSlug - The framework identifier from `@vercel/frameworks`
+ * @returns The default port number for the framework
+ */
+export function getDefaultPortForFramework(frameworkSlug?: string | null): number {
+  return portMap[frameworkSlug ?? ''] ?? FALLBACK_PORT
+}
diff --git a/packages/@sanity/cli/src/util/remoteTemplate.ts b/packages/@sanity/cli/src/util/remoteTemplate.ts
index 77db18ec5e9..6f5776890e7 100644
--- a/packages/@sanity/cli/src/util/remoteTemplate.ts
+++ b/packages/@sanity/cli/src/util/remoteTemplate.ts
@@ -318,3 +318,19 @@ export async function generateSanityApiReadToken(
     })
   return response.key
 }
+
+export async function setCorsOrigin(
+  origin: string,
+  projectId: string,
+  apiClient: CliApiClient,
+): Promise<void> {
+  try {
+    await apiClient({api: {projectId}}).request({
+      method: 'POST',
+      url: '/cors',
+      body: {origin: origin, allowCredentials: false},
+    })
+  } catch {
+    // Silent fail, it most likely means that the origin is already set
+  }
+}