# MinIO RELEASE.2019-08-07T01-59-21Z — Release & Upgrade Intelligence
- **Product:** MinIO (https://min.io)
- **Version:** RELEASE.2019-08-07T01-59-21Z
- **Released:** Aug 07, 2019
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/minio/updates/RELEASE.2019-08-07T01-59-21Z/

## Executive Summary (TL;DR)
MinIO RELEASE.2019-08-07T01-59-21Z. Source highlight: Critical Security fix has been made. Please see (#8026) for more details. Please upgrade immediately.

## New Features
- Add IAM groups support (#7981) (08/02/19)
- add `UpdateKey` method to KMS interface (#7974) (08/01/19)

## Improvements
- Performance improvement in the case of small files in distributed setup. See (#8004) for more details.

## Bug Fixes
- Critical Security fix has been made. Please see (#8026) for more details. Please upgrade immediately.
- Fix IAM users migration regression in etcd (#8029) (08/06/19)
- fix DoS vulnerability in the content SHA-256 processing (#8026) (08/05/19)