What Are OAuth Grants?

Definition

OAuth grants are permissions that allow one application to access data or perform actions in another application on behalf of a user.

They are created when a user connects one app to another.

Why it matters

OAuth makes integrations easy.

Click “Connect,” approve access, and the apps start working together.

What’s less obvious is what gets granted:

• Access to email, files, calendars, or messages
• Permission to read, write, or modify data
• Ongoing access that persists after the initial approval

Once granted, that access often continues indefinitely.

It does not depend on a user logging in again.

A simple example

An employee connects a note-taking tool to their Google Workspace account.

They approve:

• Read access to documents
• Permission to create and edit files

The integration works.

Months later:

• The employee forgets about the connection
• The tool still has access to company documents
• No one reviews or re-approves it

The access is still active.

That is an OAuth grant.

Where they come from

OAuth grants are created when:

• Users connect third-party apps
• Teams install integrations in tools like Slack or Google Workspace
• Developers authorize services to access APIs

They are designed to be quick and user-driven.

That is what makes them easy to create and hard to track.

Where identity systems break

OAuth operates outside traditional identity workflows.

• It is approved at the user level
• It is not always tied to groups or roles
• It often bypasses provisioning systems
• It persists even as users change roles

Your IDP may control login.

It does not fully control what users authorize after login.

Where the risk comes from

OAuth grants can introduce:

• Persistent access to sensitive data
• Third-party apps with broad permissions
• Access that is not reviewed or revoked
• Connections that outlive the original need

The risk is not just the app.

It is the access the app retains over time.

How to think about managing them

You need to treat OAuth like any other access.

That means:

1. Inventory connected apps: Know what has been authorized
2. Understand scopes: What data can each app access
3. Assign ownership: Who approved it and who is responsible
4. Review regularly: Confirm whether access is still needed
5. Revoke when unnecessary: Remove access that no longer serves a purpose

How this connects to effective access

OAuth grants are a direct contributor to effective access.

They create access paths that are:

• Not visible in your IDP
• Not tied to standard roles
• Often long-lived

If you don’t account for OAuth, you don’t see the full picture.

Frequently asked questions

What is an OAuth grant?

An OAuth grant is permission given by a user that allows one application to access another system on their behalf.

Do OAuth grants expire?

Some do, but many persist until they are explicitly revoked.

Why are OAuth grants risky?

They can provide long-term access to data and systems without ongoing visibility or review.

Are OAuth grants visible in my IDP?

Not fully. They are typically managed within the application environment itself.

How do you audit OAuth access?

By identifying connected apps, reviewing permissions, and monitoring usage across systems.

Where YeshID fits

YeshID surfaces OAuth grants alongside other access.

So you can:

• See which apps have access to your systems
• Understand what data they can reach
• Revoke unnecessary or risky connections

Bottom line

OAuth grants are easy to create and easy to forget.

But they are still access.