# How to Audit Third-Party App Access to Your Accounts

> Connected apps can retain access after you stop using them. Learn how to review OAuth permissions and revoke access without breaking work.

- Canonical article: [https://www.metacyber.guru/articles/oauth-app-permissions-audit](https://www.metacyber.guru/articles/oauth-app-permissions-audit)
- Category: Account Security
- Author: Muhammad Azhar
- Published: August 14, 2026
- Last reviewed: 2026-08-14

“Sign in with” and connected-app permissions save time, but access can remain long after a trial, project or device is forgotten. A quarterly permission review reduces that quiet accumulation.

## What an OAuth grant can contain

Permissions range from basic profile details to reading mail, editing cloud files, managing calendars or posting on a user's behalf. The app normally receives a token rather than the account password, but that token can still be powerful.

## Review with context

1. Open the account provider's security or connected-apps page directly.
2. Sort by recent use when the interface permits it.
3. Read the exact permissions, not only the application name.
4. Identify the business owner and replacement workflow before revoking work tools.
5. Remove abandoned, duplicated or unrecognized access.

## When an app looks unfamiliar

Revoke it, then inspect recent account activity and sessions. If the grant can read messages or files, consider what data may have been exposed. Change the password when there are other signs of compromise, although password changes do not always revoke OAuth tokens automatically.

## Reduce future permission creep

Grant the narrowest access that supports the task. Use a separate work account for automation when appropriate, document service accounts and remove connections during employee offboarding. Avoid authorizing an app from a link in an unexpected message.

## Revoking access is not data deletion

Removing a token stops future account access; it does not necessarily delete information the third party already copied. Use the provider's deletion process and keep confirmation when sensitive data is involved.

A permission audit is effective because it asks a concrete question: which outside services can act on this account today? The answer should be short, current and explainable.

## Read the scope as a capability list

“View profile” is different from reading all mail, modifying cloud files or acting as the user. Compare each permission with the feature you actually use. A PDF converter should not need permanent mailbox access, and a scheduling tool may not need the ability to delete calendar events.

## Removal is only one part of cleanup

Revoking an OAuth grant stops future API access, but it does not erase data the vendor already copied. Review the vendor's account and deletion controls, then change the primary password only if credentials were also exposed. For business tenants, record the app identifier, owner, scopes and last use.

Repeat the audit after mergers, product rebrands or long periods of inactivity. An application can remain authorized even when its original purpose has been forgotten.

## Sources and further reading

- [Google Account Help: Manage third-party connections](https://support.google.com/accounts/answer/13533235)
- [IETF: OAuth 2.0 Security Best Current Practice](https://www.rfc-editor.org/rfc/rfc9700)

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