Skip to the content
The Update Bureau
SQL Server 2017 GDR SQL Server 2017 GDR Security update
Patch Tuesday

KB5090347

KB5090347: Security update for SQL Server 2017, GDR branch, May 2026. Linked-server queries with MSDASQL provider strings fail

In short

The update addresses an XML external entity flaw in Integration Services. Linked-server queries using MSDASQL with a provider string can fail with error 7416.

Does it affect you? Applies to: Devices running SQL Server 2017 or a SQL Server 2017 GDR release, on supported x64-based systems. SQL Server 2017 or a SQL Server 2017 GDR release is required to apply the update.

Build
14.0.2110.2
Servicing branch
GDR
Security
1 fixed
Restart
Required

For servers on the GDR branch: they get security fixes only. Servers that install cumulative updates (CU branch) get a separate update. Which branch am I on?

What changes

Fix 1 change

Integration Services

  • The XML external entity (XXE) vulnerability in the Web Service Task is addressed. It could let an attacker read local files or cause a denial-of-service (DoS) attack.1
    Bug reference 5131020; platform: Windows.

Known issues

  1. Open Affects: Organizations and IT administrators

    Linked server queries that use MSDASQL fail with error 7416

    Linked-server queries that use the MSDASQL provider and specify a provider string (@provstr) fail with error 7416, stating that no login mapping exists. The Database Engine's stricter connection validation can reject certain configurations, even if earlier builds allowed them.2

    Workaround status No workaround yet

    Microsoft has not published a manual workaround for this issue yet. Monitor release health until a resolving update is available.

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2026-05-12
Classification
Security Updates
Type
Cumulative update
Servicing branch
GDR
Restart
Required
Replaces
KB5084819, KB5077472, KB5068403, KB5065224
+6 earlier KB5063760, KB5058716, KB5046857, KB5046058, KB5042217, KB5040942
Replaced by
KB5102338
VersionBuildChannel
2017 14.0.2110.2 General availability

Security

1 vulnerability fixed
1 important
VulnerabilitySeverityCVSS
CVE-2026-40370
SQL Server Remote Code Execution Vulnerability
 Important 8.8

Downloads (Microsoft Update Catalog)

Package 2017
452.4 MB
sqlserver2017-kb5090347-x64.exe Main update · KB5090347 SHA-1: 90c7bfc4…052a49

Updated components

124 files changed since the previous update for the same versions.

Top changed componentsFiles
SQL Server Engine92

Sources

Updated
Cited passages from Microsoft's official notes (2)
  1. 1. This fix addresses an XML external entity (XXE) vulnerability in the Web Service Task that allows an attacker to read arbitrary files from the local file system or cause a denial-of-service (DoS) attack. support.microsoft.com
  2. 2. Linked server queries that use the MSDASQL (OLE DB Provider for ODBC Drivers) provider and specify a provider string (@provstr) fail and return the following error message: support.microsoft.com
Checked automatically: 8 of 8 checks passed, 2 quoted passages · compared with Microsoft's page on Sep 26, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 5/5, clarity 5/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake