What is least-privilege access?
Least-privilege access means each person or process gets only the access needed to do its job, for as long as it's needed, and nothing more.
Last updated 29 October 2026
What it looks like in practice
- Give each person the narrowest role that covers the task, not a broad admin role because it's more convenient.
- Limit access three ways: which permissions, on which resources, and for how long.
- Use an ordinary account for email and everyday work, and an admin account only for admin tasks.
- Grant extra access for a set period and remove it automatically when the period ends.
- Review access regularly and remove what is no longer needed.
Why access creeps
Access tends to grow. People move teams, join projects and get temporary access that nobody removes, and without regular reviews they keep all of it. Expiry dates on temporary access, offboarding that removes everything on the last day, and periodic access reviews keep it in check.
It applies to software too
NIST's definition covers users and the processes acting on their behalf. That includes service accounts, integrations and AI agents: each should hold only the permissions its job needs, so a fault or a compromise reaches as little as possible.
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What's the difference between least privilege and just-in-time access?
Least privilege is the principle: only the access needed. Just-in-time access is one way to apply it, granting extra access only when it's needed and removing it automatically afterwards.
Does least privilege apply to AI agents?
Yes. An AI agent that acts in your systems is a process acting on someone's behalf, so it should hold only the permissions its job needs, with risky actions waiting for a person.
Where should we start?
With admin roles, because they can change the most. Reduce how many people hold them, make extra access time-limited, and review regularly who has what.
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