Why do OCI API keys and secret keys create governance risk even when cloud access is read only?

Why read-only keys still create governance exposure

Read-only access is still an enterprise governance issue because a key is an accountable access path, not just a write capability. If the organisation cannot inventory the key, identify the owner, understand which systems or policies it reaches, and prove when it was last reviewed, the access path can outlive the need for it and quietly expand operational risk.

That is why even read-only OCI API keys and secret keys belong in governance, review, and revocation workflows. The question is whether the credential is discoverable, attributable, and bounded by policy, not whether it can modify resources.

Read-only credentials also matter because they often become the first step in larger compromise chains. Attackers do not need write access to learn tenancy structure, enumerate assets, map permissions, collect metadata, or stage later misuse through another account or integration.

What makes OCI API keys and secret keys hard to govern

OCI keys are usually issued for a specific technical purpose, but in practice they can spread across scripts, automation, integrations, and shared operational runbooks. Once that happens, ownership becomes ambiguous and the access path is easy to forget, especially when the key still appears harmless because it only reads data.

Governance breaks down when teams track the application that uses a key but not the person or team responsible for certifying it. A read-only key that is not tied to a named owner, rotation date, and approval basis is difficult to defend during review, because no one can confidently answer why it still exists.

This is also why cataloguing the key alone is not enough. A usable governance record should show who approved it, what it can reach, whether the scope still matches the use case, and whether the credential has a clear revocation path if the owning system or team changes.

Why read-only still increases blast radius and compliance burden

Read-only permissions can expose inventory, configuration, logs, billing data, object metadata, and service relationships that are useful to both operators and attackers. That information may be enough to accelerate phishing, privilege escalation planning, lateral movement, or data targeting even when the key cannot change state directly.

From a control perspective, read-only access still has to be recertified because it can violate least-privilege expectations over time. A stale credential that remains valid after a project ends, a contractor departs, or an integration is replaced creates governance drift even if no obvious incident has occurred.

Read-only keys also create audit pressure because the organisation must demonstrate that access is reviewed against current business need. If the control owner cannot show lifecycle management, the issue is not the permission level, it is the lack of demonstrable accountability over a live credential path.

Risk and Threat Considerations

Read-only keys can still expose enough information to support reconnaissance, permission mapping, and downstream abuse, so the risk is not limited to accidental misuse by legitimate users. The bigger concern is unmanaged persistence, where an old credential remains valid long after the business reason for it has disappeared.

Failure mechanism: The key is issued or copied for a narrow use case, then loses clear ownership, inventory visibility, or review cadence. Because it only reads, teams postpone rotation or revocation, which allows the access path to persist and drift beyond its original purpose.

Impact: The organisation accumulates hidden access that can be used for enumeration, sensitive data discovery, policy mapping, and later attack staging. Even without write capability, the credential increases exposure, complicates audits, and makes eventual cleanup more disruptive.

Practitioner Guidance

What to verify: Verify that every OCI API key or secret key has a named owner, an expiry or review date, and a documented business purpose. If you cannot match the credential to a current system, team, and approval basis, treat it as a governance defect, not a benign read-only exception.

Decision rule: If the key can still authenticate to any production tenant, bucket, log store, or policy-relevant resource, include it in periodic access recertification and rotation planning. Read-only should reduce privilege, not reduce scrutiny.

What good looks like: A mature process can answer, for each key, who owns it, what it reaches, when it was last reviewed, and how fast it can be revoked. That is the standard that prevents read-only access from turning into invisible standing access.

Practitioner takeaway: Treat read-only API and secret keys as governed credentials with lifecycle obligations, because the governance failure usually comes from orphaned access and poor accountability, not from the permission level itself.

Related resources from NHI Mgmt Group

• Why do shared cloud artefacts create governance risk even when access is authorised?
• Why do non-human identities create compliance risk even when policies exist?
• When does JIT access create more risk than it reduces?
• What is the difference between role-based access and API key governance for NHI security?