Should organisations prioritise just-in-time access over broad access reviews?

Why just-in-time access usually beats broad access reviews for high-risk privilege

Access reviews answer a governance question: who has what, and should they still have it. Just-in-time access answers a risk question: how much privilege is actually active right now. For permissions that can change systems, expose secrets, or create lateral movement paths, reducing standing access is usually the faster and more reliable control improvement.

That does not make access reviews obsolete. They remain useful for entitlement hygiene, ownership, and auditability. But if the business is deciding where to put effort first, JIT is the control that changes exposure immediately, while review campaigns mostly document and clean up exposure after it already existed.

For privilege that is used infrequently, the gap between “entitled” and “active” matters more than the cadence of recertification. A role can look approved on paper and still represent unnecessary risk if it stays permanently available for admin work, emergency operations, or machine-to-machine access that is only needed in short windows.

How JIT and access reviews work together in an access governance program

The most effective model is usually not JIT versus reviews, but JIT with reviews as the backstop. JIT should narrow standing privilege to the smallest eligible set, while reviews should validate eligibility, ownership, and exceptions. If a review process keeps approving broad standing access, it is compensating for a control design problem rather than fixing it.

That distinction matters because broad access reviews can become rubber-stamp exercises when reviewers are asked to approve large entitlements they do not actively use. JIT reduces that burden by making the default state safer, so the review process can focus on the few roles that truly need persistent privilege.

Where teams need a deeper operating model for this balance, the Privileged Access Management Guide explains how JIT, session control, and zero standing privilege fit into modern PAM.

For review-driven programs, Access Reviews and Certification Guide is the better lens for turning certification cycles into actual entitlement reduction rather than paper compliance.

When broad reviews still matter, and what they miss if used alone

Broad reviews still matter for entitlement visibility, role cleanup, separation-of-duties conflicts, and showing that someone owns each privileged path. They are especially helpful where the access model is messy, where roles have accumulated over years, or where a system cannot yet enforce JIT cleanly. In other words, reviews help you understand the access estate even when you cannot yet reshape it perfectly.

What they miss is temporal exposure. A quarterly review can confirm that a dangerous entitlement exists, but it does not shorten the window during which that entitlement can be abused. If the permission is active for 90 days, the attack surface remains open for 90 days, even if the next review eventually flags it.

That is why high-risk privileged access should be treated differently from routine business access. The more sensitive the action, the more useful a short-lived entitlement becomes, especially when the access can be brokered, approved, and recorded only for the specific task.

Risk and Threat Considerations

Standing privilege increases the chance that a legitimate entitlement becomes an attack path. The main risk is not only excess access, but also the long period during which stolen credentials, overbroad roles, or weak approval logic can be exploited before anyone notices.

Failure mechanism: Broad access reviews detect excessive entitlement after the fact, but they do not reduce the active window of privilege. An attacker who obtains a valid privileged account, token, or session can use it while it remains continuously available, which is why long-lived admin access is such a common amplification point.

Impact: The likely consequence is larger blast radius, easier privilege escalation, and slower containment. If the access path can reach cloud administration, secrets, production configuration, or third-party remote support, the organisation inherits a much bigger compromise surface than the review process alone can control.

Practitioner Guidance

What to prioritise: Put JIT first for permissions that can materially change systems, access secrets, or create irreversible operational impact. Keep access reviews for eligibility, ownership, and exception handling, but do not let a clean certification cycle substitute for reducing standing privilege.

What to verify: Confirm that the access is actually time-bound, that approval is tied to a specific task or window, and that the activation path logs who approved it, when it expired, and what session or action occurred during the grant. If you cannot prove those points, the access is not really JIT in operational terms.

What practitioners underestimate: Review quality and privilege duration are different problems. A well-run review can still leave you with a permanently dangerous access model, while a strong JIT design can cut exposure even before every entitlement catalogue issue is fully cleaned up.

Practitioner takeaway: Use broad access reviews to govern the estate, but use JIT to reduce real exposure. If the permission is high risk and infrequently used, shortening privilege lifetime is usually the higher-value control decision.

Related resources from NHI Mgmt Group

• When do NHI access reviews create more value than a one-time cleanup?
• Should organisations prioritise just-in-time access over broader GRC automation?
• When should organisations prioritise just-in-time admin access over permanent privilege?
• When should organisations prioritise discovery over access reviews?