{% hint style="info" %} Steps to reproduce

1. Open example.com/login.
2. Open browser devtools.
3. Get value for SESSION cookie.
4. Open example.com/login in the incognito tab.
5. In the incognito tab, change cookie value to the one, obtained in step 3.
6. In the normal tab (the one from steps 1-3) log in as any user.
7. Refresh page in the incognito tab.

Result

You are now logged in the incognito tab as user from step 6 as well. {% endhint %}