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What should be used instead of the AWS IAMAccessAnalyzerReadOnlyAccess managed policy for least privilege?

Use a narrower policy that grants only the Access Analyzer read actions required for the review task. IAMAccessAnalyzerReadOnlyAccess is broader than many operators need, so limit access to specific analysis workflows and users who inspect findings. Recheck the policy when teams only need reports, not full read access to the service.

What should replace a broad AWS managed policy for Access Analyzer?

A managed policy is often a convenience default, but least privilege usually means replacing it with a smaller custom policy that grants only the Access Analyzer read actions needed for the review workflow. The key is to preserve the analyst’s ability to inspect findings without granting broader service access than the task requires.

For AWS IAM policy design, the right question is not whether someone should “have read-only access” in the abstract, but which API actions are actually needed to inspect analyzers, findings, and related metadata. That is why a narrower policy is usually better than a generic managed policy, especially when the operator only needs reporting or occasional review rather than continuous service visibility. See the broader AWS IAM Policies and Roles Guide for how policy scope, evaluation logic, and permissions boundaries shape practical least privilege.

A good replacement should be task-scoped and role-scoped. In practice, that means separating the people who only review findings from the people who administer analyzers, and avoiding the habit of attaching a service-wide read policy when a narrower statement set will do. The same design principle applies across identity governance and IAM and IGA Basics: access should track the actual business function, not the convenience of a broad managed policy.

If the reviewer only needs visibility into analysis results, the policy should reflect that limited workflow and nothing more. That is especially important when the same role could later be reused by automation, support staff, or cross-account operators, because broader read access tends to become a standing entitlement. If Access Analyzer is being used as part of a larger privileged workflow, the patterns in the Privileged Access Management Guide are a useful reference for keeping access time-bound and job-specific.

Risk and Threat Considerations

Broad read access is not harmless just because it is “read only.” Access Analyzer data can reveal resource relationships, external access paths, and security-relevant configuration detail that helps an attacker or an overly curious operator map the environment. If the same policy is attached too widely, it can also become a quiet source of overexposure that is hard to notice until a finding is mishandled or the role is repurposed.

Failure mechanism: A managed policy grants more analyzer visibility than the operator actually needs, which increases the blast radius if the role is misused, shared, or later inherited by another workflow.

Impact: Excessive read access can expose sensitive posture details, weaken access segmentation, and make it easier to enumerate targets, validate trust relationships, or browse findings beyond the original review purpose.

Standards & Framework Alignment

This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.

NIST SP 800-53 Rev 5 and CSA Cloud Controls Matrix set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.

Framework Control / Reference Relevance
NIST SP 800-53 Rev 5 AC-6 — Least Privilege Least privilege directly governs trimming Access Analyzer read access to task needs.
IA-2 — Identification and Authentication (Organizational Users) The policy is attached to a human reviewer role that must be authenticated before use.
AC-2 — Account Management Role assignment and entitlement review are central when replacing an overly broad managed policy.
Recommendation — Limit the role to only the Access Analyzer actions required for the review task. Require authenticated access before granting the reviewer role. Review who holds the role and remove the broad policy from principals that do not need it.
ISO/IEC 27001:2022 A.5.15 — Access control Access control governs narrowing AWS permissions to the minimum review scope.
Recommendation — Define and enforce access rules that restrict analyzer visibility to the needed workflow.
CSA Cloud Controls Matrix IAM — Identity and Access Management IAM domain controls cloud entitlement scope and role-based access to analysis findings.
Recommendation — Right-size the cloud role so it only exposes the analyzer data the job needs.

Practitioner Guidance

What to verify: Confirm which Access Analyzer actions the workflow truly needs, then compare them against the current role attachment. If the user only reviews findings, the policy should not include extra service actions that support administration rather than inspection.

Decision rule: If a team only needs reports or findings review, use a purpose-built policy or tightly scoped custom statement set instead of a broad managed policy. If the same principal also administers analyzers, split those duties so the read-only path stays narrow.

What practitioners underestimate: “Read-only” policies often look safe during review but become problematic when they are attached to shared roles, reused across environments, or inherited by automation. The smallest effective policy is the one that still matches the actual review task, not the one that is easiest to reuse.

Practitioner takeaway: Treat the managed policy as a starting point for review, not as the final privilege model, and shrink it to the specific Access Analyzer read actions that the role genuinely needs.