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Microsoft Security Advisory CVE-2026-69806: .NET Elevation of Privilege Vulnerability

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This is a security advisory draft in the PowerShell/Announcements repo, not a code task, and the body still has unfilled TBD placeholders for the summary, mitigation, acknowledgments and revision date. Any change needs the Microsoft security team's decision, and the technical discussion lives in dotnet/sdk issue 56167. Done would mean the maintainers have finalized the advisory text, which a newcomer cannot judge from this issue.

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Mô tả

PowerShell Security

Microsoft Security Advisory CVE-2026-69806: .NET Elevation of Privilege Vulnerability

Executive Summary

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET SDK dotnet watch. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

The dotnet-watch AspireServerService exposes information through the use of certain arguments, that in turn can enable code injection.

System administrators are advised to update PowerShell 7 to an unaffected version (see affected software).

Discussion

Please open a support question to discuss the PowerShell aspects of this advisory.
Please use https://github.com/dotnet/sdk/issues/56167 for discussion of the .NET SDK aspects this advisory.

Affected Software

The vulnerability affects PowerShell 7 prior to the following versions:

PowerShell 7 Version Affected version Patched Version
7.6 <7.6.6 7.6.6
7.5 <7.5.11 7.5.11
7.4 Not affected Not affected

The vulnerability affects PowerShell when running on the following operating systems:

Operating System Affected
Windows No
macOS No
Linux Yes

Advisory FAQ

How do I know if I am affected?

If all of the following are true:

  1. Run pwsh -v, then, check the version in the table in Affected Software to see if your version of PowerShell 7 is affected.
How do I update to an unaffected version?

Follow the instructions at Installing PowerShell 7 to install the latest version of PowerShell 7.

Updating PowerShell 7 using Microsoft Update

Updating PowerShell 7 using Microsoft Update

Other Information

Reporting Security Issues

If you have found a potential security issue in PowerShell 7,
please email details to [email protected].

Support

You can ask questions about this issue on GitHub in the PowerShell organization.
This is located at https://github.com/PowerShell/.
The Announcements repo (https://github.com/PowerShell/Announcements)
will contain this bulletin as an issue and will include a link to a discussion issue where you can ask questions.

Disclaimer

The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

What if the update breaks my script or module?

You can uninstall the newer version of PowerShell 7 and install the previous version of PowerShell 7.
This should be treated as a temporary measure.
Therefore, the script or module should be updated to work with the patched version of PowerShell 7.

Acknowledgments

Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure.

See acknowledgments for more information.

External Links

CVE-2026-69806

Revisions

V1.0 (September 11, 2026): Advisory published.

Version 1.0
Last Updated 2026-09-11

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