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AWS IAM Least Privilege in 2026: A Practical Guide for DevOps Teams

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A DevOps guide argues that least privilege should be treated as an ongoing cycle rather than a one-time policy: grant what a workload needs, review real usage in CloudTrail, remove unused permissions, and repeat. It recommends roles and temporary credentials such as instance profiles, IRSA, and OIDC-based CI federation over long-lived access keys, which are frequently involved in breaches. The author warns that temporary administrator access tends to become permanent and suggests starting with narrower permissions and widening them based on data. IAM Access Analyzer is highlighted for generating policies from actual activity and flagging unused or external access, while permission boundaries and SCPs are presented as guardrails that limit damage when a policy is written too broadly.

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