Why do access requests in ITSM create over-permissioning risk?

How ITSM tickets turn isolated approvals into cumulative entitlement drift

An access request workflow looks safe because each approval is narrow, auditable, and tied to a business need. The over-permissioning risk appears when those individual approvals accumulate across roles, applications, environments, and time, so the user ends up with a broader effective access profile than any one ticket suggests.

ITSM also tends to optimise for request completion, not entitlement shape. That means the workflow can approve a license tier upgrade, a temporary exception, a duplicate entitlement, or a persistent access path that never gets reconciled back into least privilege. The issue is not the ticket itself, but the fact that the ticket is a transaction view of a stateful identity.

In practice, the subject is really entitlement management and access governance, not request handling alone. The question is whether the organisation can see the combined access picture, including role overlap, stale grants, exception paths, and access that remains after the original business purpose has changed.

Where request-by-request review fails to show the real access shape

Request-based approvals break down when reviewers evaluate only the latest request in front of them. A manager may reasonably approve one more system, one more report, or one more elevated permission, but the cumulative result can create role explosion, privilege creep, and conflicting access patterns across the same person or service account.

This becomes more severe when the ITSM process is disconnected from identity governance, role engineering, or entitlement review. Without a shared inventory of granted access, the organisation may not notice that several “small” approvals together cross a material boundary, such as production access, finance data access, or admin-like capability. IAM and IGA Basics is useful here because the core failure is usually governance drift, not a single bad approval.

Request workflows also struggle with exceptions. Temporary access, emergency access, and license upgrades often outlive their original purpose unless there is a separate control to expire, recertify, or remove them. The organisation may believe it granted a narrow exception, while the identity layer quietly converts that exception into standing privilege.

Why this is an access governance problem, not just a service desk problem

ITSM systems are good at recording demand and approval history, but they are weaker at enforcing the end state of access. Effective control requires knowing what was requested, what was actually provisioned, what remains active, and whether the entitlement still matches the job function or task. That is why least privilege, access review, and entitlement normalization matter as much as request approval.

For many environments, the practical safeguard is to treat access requests as inputs to a governed entitlement model rather than as permission to accumulate whatever has been individually approved. Authorisation Models Guide helps because different models create different overlap risks, and Privileged Access Management Guide is the right companion when requests can create admin-like or otherwise high-impact access.

Where requests drive elevated access, JIT and time-bound controls reduce the chance that “approved once” becomes “kept forever.” In other words, the control objective is not only approval correctness, but access decay prevention.

Practitioner Guidance

What to verify: Check whether the ITSM approval log is being reconciled against the active entitlement set. If the workflow cannot show current effective access, you do not really have access governance, only request history.

Decision rule: If a request creates access to production, sensitive data, or administrative functions, require an expiry path, a recertification trigger, or a bounded role, not just a manager approval. If none of those exist, treat the request as a likely privilege-creep source.

What practitioners underestimate: The highest-risk cases are often not the obviously privileged tickets, but the repeated small approvals that stack into a materially broader access posture over months. That is where entitlement drift hides.

Practitioner takeaway: The control question is not “Was this ticket approved?” but “Does the full set of approved access still satisfy least privilege after all prior requests are combined?”

Related resources from NHI Mgmt Group

• When does JIT access create more risk than it reduces?
• Why do non-human identities create more audit risk than human accounts?
• Why do non-human identities create audit risk in modern environments?
• Why do non-human identities create compliance risk even when policies exist?