25/08/2026
AWS Lambda resource policies now need 3 IAM permissions, and the docs disagree on RevisionId: Lambda full IAM resource-based policies shipped on 25 August 2026 at no extra charge. The launch adds three APIs on a new 2026-07-09 path, keeps the old 20 KB ceiling, and leaves two AWS pages in conflict.
Lambda's PutResourcePolicy went live 25 August 2026. It needs three IAM permissions, keeps the 20 KB cap, and two AWS pages disagree on RevisionId.