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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 4/30/2026
- 5/2/2026 - Downscale Splunk Prod Indexers to 54 from 81
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
5/8/2026 - Splunk GovCloud Upgrade
Summary:
CMS Enterprise Splunk team will upgrade our current Splunk version from 9.4.4 to 10.2.1 to remediate vulnerabilities.
Actions we are taking:
- Splunk GovCloud Upgrade from 9.4.4 to 10.2.1
When is this happening?
Start Time: Friday, 5/8/2026 at 5:00 p.m. ET
End Time: Sunday, 5/10/2026 at 11:00 p.m. ET
Who will be impacted?
CCIC Search Heads peered to the Splunk environment.
What is the impact?
There will be limited impact on dashboards. We have a blue/green deployment where we have similar cluster in each environment. This configuration makes the cluster available until cutover and once cutover is done, the new deployment will be available.
5/8/2026 - Enterprise Confluence Maintenance
Summary:
CMS Enterprise Agile Tools team will upgrade the Enterprise (OIT) Confluence PROD environment to the latest Long-Term Support (LTS ) version.
Actions we are taking:
- Upgrade Enterprise Confluence to 10.2.10 LTS in PROD.
When is this happening?
Start Time: Friday, 5/8/2026 at 7:00 p.m. ET
End Time: Saturday, 5/9/2026 at 2:00 a.m. ET
Who will be impacted?
All Enterprise Confluence Users.
Additional Info:
Please note that all integrations with Enterprise Confluence must use PAT token–based authentication and not basic authentication. For additional details, please refer to the following link:
https://confluence.atlassian.com/enterprise/using-personal-access-tokens-1026032365.html.
What is the impact?
Enterprise Confluence (https://confluenceent.cms.gov/) production instance will be unavailable during the maintenance window outlined above.
Support / Questions:
For general questions about the tool and this upgrade, email CMS Agile Tools Support at AGILETOOLS@cms.hhs.gov.
5/9/2026 - Splunk DC ITSI Upgrade
Summary:
CMS Enterprise Splunk team will upgrade Splunk DC ITSI to Version 4.21.0.
Actions we are taking:
- Upgrade Splunk DC ITSI from version 4.19.1 to version 4.21.0
When is this happening?
Start Time: Saturday, 5/9/2026 at 7:00 a.m. ET
End Time: Saturday, 5/9/2026 at 3:00 p.m. ET
Who will be impacted?
Enterprise Operations Center (EOC) Users.
What is the impact?
Splunk DC ITSI will be unavailable during the upgrade and the upgrade is expected to take 6 hours. Some users will be impacted and wont be able to log into to ITSI Splunk DC Search Head .
5/10/2026 - Marketplace SSM Patching
Summary:
As part of our normal patching, the CMS Hybrid Cloud team will apply the latest Windows and Linux patches on Sunday, 5/10/2026 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, 5/10/2026 at 12:00 a.m. ET
End Time: Sunday, 5/10/2026 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
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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