Pentesting#xss#web#csp
Does React/Vue automatically protect me from XSS?
By Cyberstar Editorial·June 4, 2026 4 min 0
Short answer
Mostly yes — they escape values by default. But dangerouslySetInnerHTML, v-html, href="javascript:", and unsanitized markdown still open the door.
The full answer
React, Vue, and Svelte escape interpolated values when rendering text, which neutralizes the most common stored-XSS vector.
You re-introduce risk when you bypass the escape: dangerouslySetInnerHTML in React, v-html in Vue, or rendering user-supplied HTML/Markdown without a sanitizer like DOMPurify.
URL sinks are another trap: <a href={userUrl}> can become a javascript: URL. Validate the protocol or use a URL allowlist.
Add a Content Security Policy (CSP) as defense in depth. A strict CSP with nonces blocks most XSS payloads even if a bug slips through.
Was this helpful?
Upvotes help us prioritise what to answer next.