User groups are collections of users that share common access needs. In identity governance, they reduce one by one permission assignment by letting administrators grant access at the group level, then attach resources or collections to that group. This simplifies administration, supports least privilege, and makes access review more repeatable.
Expanded Definition
User groups are a governance construct for bundling users by shared access requirements so administrators can assign entitlements once, then apply them consistently across systems, applications, and data sets. In identity and access management, groups reduce direct, one-off permissioning and create a more repeatable control surface for access reviews, provisioning, and offboarding. Their value is highest when they map to business roles, operational teams, or service functions rather than to temporary project structures.
In NHI and broader identity programs, group design should be treated as an access policy problem, not just an administrative shortcut. Poorly scoped groups can accumulate access over time, obscure who can reach what, and weaken least privilege. That is why guidance from NIST Cybersecurity Framework 2.0 matters here: identity governance depends on clear control of access assignment and review. Definitions vary across vendors when groups are mixed with attributes, dynamic rules, or entitlements packages, so teams should document whether a group is static, role-based, or rule-driven. The most common misapplication is using broad catch-all groups for convenience, which occurs when administrators favor speed over entitlement precision.
Examples and Use Cases
Implementing user groups rigorously often introduces mapping overhead, requiring organisations to weigh simpler administration against the cost of maintaining clean membership rules and periodic review.
- A finance group receives access to ledger systems, invoice workflows, and export tools, while membership is limited to staff with verified job duties.
- A cloud operations group is granted administrative access to infrastructure consoles, but only after the member also meets a separate privileged-access approval path.
- A contractor group is created with time-bounded membership so onboarding and offboarding can follow a predictable lifecycle instead of individual ticket handling.
- A service desk group is used to assign standard support tooling, while sensitive production access remains outside the group and requires explicit approval.
- An organisation audits group membership during identity reviews to confirm that access still matches job function, not historical convenience.
For NHI programs, this approach should be aligned with the broader visibility and lifecycle concerns described in the Ultimate Guide to NHIs, especially where human and non-human access patterns overlap. It also aligns with NIST’s emphasis on repeatable identity control in NIST Cybersecurity Framework 2.0.
Why It Matters in NHI Security
User groups become security-critical when they are used to govern access to service accounts, automation tooling, API key administration, or shared operational consoles. In those environments, a weak group model can create privilege sprawl faster than individual assignments, especially when membership is inherited from legacy teams or copied during provisioning. NHIMG research shows that 97% of NHIs carry excessive privileges, a strong signal that access aggregation and weak entitlement hygiene are already widespread in modern identity estates. The same Ultimate Guide to NHIs also highlights that only 5.7% of organisations have full visibility into their service accounts, making group-based controls harder to validate unless ownership and review processes are explicit.
When groups are used carefully, they support least privilege, cleaner audits, and faster revocation. When they are not, they can hide dormant access and make it difficult to answer who can act on behalf of a machine identity or automation workflow. This is especially important in environments guided by NIST Cybersecurity Framework 2.0, where access governance must remain traceable and reviewable. Organisations typically encounter the consequences only after an internal misuse event or compromised account is investigated, at which point user group design becomes operationally unavoidable to address.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and OWASP Agentic AI Top 10 address the attack and risk surface, while NIST CSF 2.0, NIST SP 800-63 and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Group-based access can conceal excessive NHI permissions and weak entitlement hygiene. |
| NIST CSF 2.0 | PR.AC | Access control and identity governance rely on consistent group assignment and review. |
| NIST SP 800-63 | Identity proofing and lifecycle assurance influence who should be placed into access groups. | |
| NIST Zero Trust (SP 800-207) | AC-4 | Zero Trust limits implicit trust from group membership alone. |
| OWASP Agentic AI Top 10 | AGENT-03 | Agent access often inherits through groups, creating hidden tool and data reach. |
Segregate agent memberships and review inherited permissions before enabling execution tools.
Related resources from NHI Mgmt Group
- Why is SSO preferable for business AI applications with multiple user groups?
- What breaks when identity migration is not sequenced carefully across applications and user groups?
- How should security teams decide between hardware security keys and passkeys for different user groups?
- How should organisations implement identity and access management across multiple applications and user groups?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on August 28, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
