Example: AppStream 2.0 Elastic fleets session script Amazon S3 bucket policy cross-service confused deputy prevention

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "Service": [
                    "appstream.amazonaws.com"
                ]
            },
            "Action": "s3:GetObject",
            "Resource": "your session script S3 path",
            "Condition": {
                "StringEquals": {
                    "aws:SourceAccount": "your AWS account ID"
                } 
            }
        }
    ]
}

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "Service": [
                    "appstream.amazonaws.com"
                ]
            },
            "Action": "s3:GetObject",
            "Resource": "your session script S3 path",
            "Condition": {
                "ArnLike": {
                    "aws:SourceArn": "arn:{aws partition}:appstream:{your region name}:{your AWS account ID}:fleet/{your fleet name}"
                } 
            }
        }
    ]
}