Infinite Approval

How Infinite Approval Works

Infinite approval is a standing grant of authority. Instead of requiring a fresh authorisation for each use, the spender can keep drawing on the same allowance until someone explicitly revokes it.

That design is convenient, but it also means the approval is not self-limiting. If the approved application, wallet, service, or account is later compromised, the attacker can often reuse the existing permission path without needing to prompt the owner again.

Why Infinite Approval Becomes Dangerous

The core problem is persistence of trust. A one-time approval can outlive the original business need, the user’s intent, or the security posture of the counterparty, which turns an old permission into a reusable access path.

This is especially risky in environments where approvals are broad, poorly tracked, or granted to third-party tools. An over-trusted spender can accumulate practical control over assets or actions long after the owner believes the relationship is finished.

Because the authorisation remains standing, compromise is often easier than takeover. An attacker does not necessarily need to steal the original owner’s credentials if they can abuse a previously approved party, token, or contract path.

Exposure, Scope, and Revocation Challenges

Organisations and users usually discover infinite approval through asset inventory and permission review, not through the approval event itself. The key exposure question is whether any standing grant still exists that allows repeated use, especially across high-value accounts, wallets, integrations, or automation paths.

Scope matters because one excessive approval can create broad downstream reach. A permission intended for a single interaction may end up authorising repeated transfers, writes, reads, or delegated actions until it is removed.

Revocation is therefore part of the security model, not an afterthought. If revocation is slow, opaque, or impractical, the approval effectively behaves like a long-lived credential with no natural expiry.

Controls That Reduce Standing-Approval Risk

Safer designs prefer short-lived, narrowly scoped grants over indefinite ones. Where possible, approvals should expire automatically, be bounded to a specific amount or action, and be easy for the owner to review and revoke.

For integrations and platforms, least privilege should apply to the approved action itself, not just to the account that requested it. NIST SP 800-53 Rev 5 Security and Privacy Controls is useful here because its access control, identification, authentication, audit, and configuration controls all support tighter approval governance.

Where approvals touch wallets, APIs, or delegated application access, review both the authority granted and the business process that keeps it active. OWASP Non-Human Identity Top 10 is a helpful reference when the standing permission is effectively a machine or application allowance that can be overprivileged or left in place too long.

Risk and Threat Considerations

Infinite approval creates a durable abuse path because the permission can be reused after the original trust decision is stale. If the spender, wallet, app, or connected service is compromised, the attacker may be able to keep acting through the standing grant until it is revoked.

Failure mechanism: A non-expiring or uncapped approval remains valid after the user has stopped thinking about it, which turns a legitimate convenience feature into a persistent authorisation channel that is easy to exploit.

Impact: The result can be repeated unauthorised transfers, delegated actions, data access, or privilege use, with loss limited only by whatever the old permission still allows.

Practitioner Guidance

What to watch for: Treat any approval that has no practical expiry, no meaningful spending cap, or no clear revocation path as a governance issue, not just a product feature. The longer a permission remains standing, the more important it becomes to confirm that the approved party is still trusted and still needs access.

Practitioner takeaway: The safest approval is one that becomes useless on its own unless the owner deliberately renews it.

Related resources from NHI Mgmt Group

• When should organisations require human approval for an AI agent action?
• When does human approval become ineffective for AI agent security?
• What is the difference between OAuth consent and access approval?
• When should security teams avoid automated approval for access requests?