Why does Google block login inside some WebView apps?

L Luke Lopez•Published 7/1/2026•296 views•1 comments

I'm trying to figure out the exact security reasons why Google decided to block WebViews for OAuth.
Is it just to promote their native SDKs, or is there a genuine security risk?

#google-signin #security #oauth

1 Comments✓

Recommended Answer

N Noopur• 7/1/2026

It is a major security risk. Since a WebView is hosted inside a native app, the developer of the native app has full programmatic access to the WebView DOM. This means the app can inspect the password fields, read keypresses, or steal OAuth cookies. By forcing standard browsers or Custom Tabs, Google ensures the authentication happens in a sandboxed space that the host app cannot read.

Please log in to reply.

Why does Google block login inside some WebView apps?

1 Comments✓ Jump to accepted solution

1 Comments✓