Description of the security update for SharePoint Server 2019: August 11, 2026 (KB5002894)

Applies To
SharePoint Server 2019

Summary

Important

  • If you're currently running SharePoint Workflow Manager, you must install the SharePoint Workflow Manager (KB5002799) to your farm before you install this cumulative update.
  • If you're currently running the Classic version of Workflow Manager, you have to enable the debug flag in order to continue using Workflow Manager:
      $farm = Get-SPFarm
      $farm.ServerDebugFlags.Add(53601)
      $farm.update()
      iisreset

This security update resolves a Microsoft SharePoint Server Remote Code Execution vulnerability, Microsoft SharePoint Server Spoofing vulnerability, Microsoft SharePoint Elevation of Privilege vulnerability, Microsoft SharePoint Server Tampering Vulnerability, and Microsoft SharePoint Server Information Disclosure Vulnerability. To learn more about the vulnerabilities, see the following security advisories:

Note

  • This is build 16.0.10417.20198 of the security update package.
  • To apply this security update, you must have the release version of Microsoft SharePoint Server 2019 installed on the computer.

Improvements and fixes

This security update contains improvements and fixes for the following nonsecurity issue in SharePoint Server 2019:

  • Fixes an issue in which workflow status links break on the WrkStat.aspx page.

  • Provides an advisory for SharePoint 2013 workflows.

  • Notifies that orphaned Remote Event Receivers (RERs) that do not have an app identifier will be blocked starting with the November 2026 Public Update. Use the Get-SPOrphanedRemoteEventReceiver cmdlet to identify affected RERs.

  • Notifies that the ToolPane feature will be disabled starting with the September 2026 Public Update. Use the Enable-SPToolPane cmdlet to enable ToolPane for a site collection.

  • Notifies that the ExecuteProxyUpdates feature will be disabled starting with the September 2026 Cumulative Update. Use the Enable-SPWebPartPagesProxyUpdates cmdlet to enable the feature for a site collection, or the Disable-SPWebPartPagesProxyUpdates cmdlet to disable it immediately.

  • Notifies that OWA web part Exchange autodiscovery will be disabled starting with the August 2026 Public Update. Use the Enable-SPOWAWebPartAutodiscovery cmdlet to enable the feature for a web application.

  • Notifies that the SharePoint 2010 Workflow feature will be disabled starting with the September 2026 Public Update. Use the Enable-SPLegacyWorkflow cmdlet to enable the feature for a site collection.

  • Notifies that the SharePoint 2010 Workflow feature will be disabled starting with the September 2026 Public Update. Use the Enable-SPLegacyWorkflows cmdlet to enable the feature for a site collection.

  • Disables file-backed Business Data Connectivity (BDC) model import by default to improve security. Use the Enable-BdcmFileImport PowerShell cmdlet to enable this functionality for a site collection.

How to get and install the update

Method 1: Microsoft Update

This update is available from Microsoft Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Method 3: Microsoft Download Center

You can get the standalone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

More information

Security update deployment information

For deployment information about this update, see Deployments - Security Update Guide.

Security update replacement information

This security update replaces previously released security update 5002883.

File hash information

File name SHA256 hash
sts2019-kb5002894-fullfile-x64-glb.exe D6843AFB7FD10620B709DA795BD753CD109320700A354151826F60F30853D80C

File information

Download the list of files that are included in security update 5002894

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security