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Each week, the CMS Hybrid Cloud program provides a list of upcoming changes, maintenance windows, and updates to help customers build awareness and plan effectively and summarizes changes from the previous week.
This newsletter includes:
Completed change summary for the week of 6/18/2026
- 6/20/2026 - DevOps Services Maintenance
- 6/24/2026 - Marketplace SSM Patching - IMPL
- 6/24/2026 - Non-marketplace PROD SSM Patching
- 6/24/2026 - Azure Commercial - Azure Update Manager Patching - PROD
- 6/24/2026 - MAG - Azure Update Manager Patching - PROD
To learn details about previous changes please go to the News and Updates section on cloud.cms.gov. (Secure Access required)
For Patching and Gold Image release schedule please view: Patching and Gold Image Release Calendar - 2026
AWS Patch Tag Naming Update
Beginning July, AWS team will convert patch tags naming from
· Patch Group to Patch_Group
· Patch Window to Patch_Window
The tag name change in AWS will "Allow tags in metadata" setting is enabled on instances, to align with the system requirement and avoid metadata-related issues. The updated tag format will be used going forward.
The patching team will create the ITC changes starting July 22, 2026, according to the following schedule:
· Lower Environments: July 22, 2026
· Production: July 29, 2026
· Marketplace Production: August 9, 2026
As this is a behavioral change in the patching process, Technical Advisors are requested to coordinate with their respective ADOs and hosting coordinators to ensure the new tag format is updated and adopted in all future deployments. This change is specific to AWS patches only.
Please contact Enterprise Patching Team for questions / Concerns.
6/26/2026 - Enterprise Testing Services Maintenance
Summary:
In order to keep up to date with the latest versions and security advisories, the CMS Hybrid Cloud team will be performing maintenance updates on Enterprise Testing tools.
Actions we are taking:
- Update Selenium Box Hub and Executors with the latest Amazon Linux 2023 Gold Image for CMS Cloud.
When is this happening?
Start time: Friday, 6/26/2026 at 9:00 p.m. ET
End time: Friday, 6/26/2026 at 11:59 p.m. ET
Who will be impacted?
All AWS Commercial and GovCloud customers of Selenium Box.
What is the impact?
Customers should expect downtime for the service as instances are restarted within the maintenance window.
6/28/2026 - Marketplace SSM Patching - Prod
Summary:
As part of our normal patching, the CMS Hybrid Cloud team will apply the latest Windows and Linux patches on Sunday, 6/28/2026 at 12:00 a.m. ET. The week's patches will impact the PROD environment for the affected Marketplace applications noted below.
Actions we are taking:
- Marketplace PROD
- SSM Linux & Windows Vulnerability Patching
When is this happening?
Start Time: Sunday, 6/28/2026 at 12:00 a.m. ET
End Time: Sunday, 6/28/2026 at 4:00 a.m. ET
Who will be impacted?
FFM_Opera, VAMS, TWS, XES - XOC Tools, SERVIS, FFM_Shared_Services, FFM MLMS, XES - MSI Tech Lab, FFM_FM, FFM_TWS, XES - Service Virtualization
DSRS, FFM, FFM DSH, FFM EDI, FFM EFT, FFM ESDCU, MCR, FLH, OC Base- FLH, OC Base PET, FFM_MNPS, CMS Cloud - Advanced Monitoring
What is the impact?
Patches will be applied to the affected resources, reboots where tags are applied.
6/29/2026 - Migrate Splunk DRaaS ITSI from AL2 to AL2023
Summary:
This change will migrate the Splunk DRaaS ITSI application from Amazon Linux 2 (AL2) to Amazon Linux 2023 (AL2023) to maintain operating system support, improve security posture, and align with CMS cloud modernization standards.
Actions we are taking:
Replacing DRaaS ITSI Search Head with a new AL-2023 server.
When is this happening?
Start Time: Monday, 6/29/2026 at 5:00 p.m. ET
End Time: Monday, 6/29/2026 at 10:00 p.m. ET
Who will be impacted?
DRaaS ITSI Services will be impacted.
What is the impact?
Splunk users can experience some latency during the migration accessing the application.
Need help? We are here to support you.
If you have any questions, don't hesitate to reach out to your assigned Hosting Coordinator. CMS IT Support can be reached via cloudsupport@cms.hhs.gov, or call (800) 562-1963, and is documented here at Support Page on cloud.cms.gov.
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