Skip to content

fix: add sandbox and CSP to playground preview iframe #3489

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
gavinbarron merged 1 commit into from
May 20, 2026
Merged

fix: add sandbox and CSP to playground preview iframe #3489

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
20 changes: 20 additions & 0 deletions .storybook/addons/codeEditorAddon/codeAddon.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -228,6 +228,14 @@ export const withCodeEditor = makeDecorator({
const loadEditorContent = () => {
const storyElement = document.createElement('iframe');

// Security: sandbox the iframe to restrict capabilities.
// allow-same-origin is required for ES module loading; exfiltration is
// blocked by the CSP meta tag injected below.
storyElement.setAttribute(
'sandbox',
'allow-scripts allow-same-origin allow-popups allow-popups-to-escape-sandbox allow-forms'
);

storyElement.addEventListener(
'load',
() => {
Expand All @@ -242,6 +250,18 @@ export const withCodeEditor = makeDecorator({
const docContent = `
<html>
<head>
<meta http-equiv="Content-Security-Policy"
content="default-src 'self';
script-src 'self' 'unsafe-inline';
style-src 'self' 'unsafe-inline';
connect-src https://graph.microsoft.com https://graph.microsoft.us https://dod-graph.microsoft.us https://graph.microsoft.de https://microsoftgraph.chinacloudapi.cn https://canary.graph.microsoft.com https://login.microsoftonline.com https://cdn.graph.office.net 'self';
img-src 'self' data: blob: https://*.microsoft.com https://*.microsoftonline.com https://*.sharepoint.com https://*.office.com https://*.office365.com https://*.windows.net;
font-src 'self' https://static2.sharepointonline.com;
frame-src https://login.microsoftonline.com 'self';
form-action 'none';
object-src 'none';
base-uri 'self';"
/>
<script type="module" src="${mgtScriptName}"></script>
<script type="module">
import { registerMgtComponents } from "${mgtScriptName}";
Expand Down
Loading