Auth0 Invalid State Error

How to fix it

Try these in order — the most common fix is first.

1. 1. Verify state storage

   1. Confirm the cookie, session or local storage used for the state value is working and not cleared between redirect and callback
   Did this fix it? Yes No

2. 2. Let the SDK handle state

   1. Most modern SDKs, including Auth0.js, generate and validate state automatically; check their configuration rather than implementing it yourself
   Did this fix it? Yes No

3. 3. Fix callback parsing and size

   Copy steps
   1. Make sure the callback handles state in both the request body and the query string
   2. If you get 414 Request-URI Too Large, use a smaller state value
   Did this fix it? Yes No

Symptoms

Callback page throws "Invalid state" (or "state mismatch"), and the user is sent back to login.

Why it happens

• Stored state (cookie, session or local storage) is missing or unavailable when the callback runs
• Response is for an unsolicited request, or the response was tampered with
• Callback does not read state from the right place (request body or query string, depending on connection type)
• State value too long (414 Request-URI Too Large)

This guide also covers

• auth0 invalid state
• auth0 invalid_state error
• auth0 state mismatch

The same problem in other apps

All not loading, error messages & connection guides →

• Firebase auth/invalid-api-key Error (Firebase)
• Supabase Max Client Connections Reached (Supabase)

Other Auth0 errors

• Auth0 Callback URL Mismatch Error
• Auth0 Login Loop: Silent Authentication Not Working
• Auth0 CORS Error
• Auth0 Refresh Token Not Working
• Auth0 invalid_grant Error
• Auth0 Social Login Not Working
• Auth0 Rate Limit Exceeded (429 Too Many Requests)
• Auth0 MAU Limit & Pricing Jump