Group based access control: what IAM teams are missing

TL;DR: Group based access control reduces manual permission assignment, but the article also shows how stale memberships, overlapping groups, and weak audit discipline still create access drift and compliance risk, according to Zluri. The governance problem is not grouping itself, but whether identity lifecycle controls keep group membership, time-bound access, and least privilege aligned as roles change.

NHIMG editorial — based on content published by Zluri: Understanding Group Based Access Control for Better Security

By the numbers:

• 63% of organizations struggle with managing access permissions across their workforce, causing confusion and compliance risks.
• Only 20% have formal processes for offboarding and revoking API keys, and even fewer have procedures for rotating them.
• Only 5.7% of organisations have full visibility into their service accounts.

Questions worth separating out

Q: How should security teams prevent group based access control from creating stale permissions?

A: Treat group membership as lifecycle data, not static configuration.

Q: Why do overlapping groups create governance risk in IAM programmes?

A: Overlapping groups can stack permissions in ways that are hard to interpret, especially when a user belongs to multiple role, project, or admin groups.

Q: What breaks when time-bound access is not used for temporary group membership?

A: Temporary access becomes permanent by default, which leaves contractors, project members, and backup staff with rights long after the need has ended.

Practitioner guidance

• Map every group to a clear business purpose Document the owner, intended role, and access scope for each group so reviewers can tell whether membership still matches the original need.
• Put expiry on temporary access groups Assign start and end dates to project, contractor, and leave-cover groups so access terminates automatically unless someone explicitly renews it.
• Review overlapping memberships for effective access Check where users inherit permissions from multiple groups and confirm the combined result still follows least privilege.

What's in the full article

Zluri's full blog post covers the operational detail this post intentionally leaves for the source:

• Step-by-step group design guidance for departments, roles, and team-based access models
• Examples of time-bound access setup for temporary users, projects, and role transitions
• Practical naming convention ideas for making group intent readable in audits
• A worked explanation of least-privilege application inside group based access control

👉 Read Zluri's analysis of group based access control and security →

Group based access control: what IAM teams are missing?

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