CVE-2026-45490: .NET SDK Elevation of Privilege Vulnerability

Published Jun 9, 2026
·
Updated

.NET SDK Elevation of Privilege Vulnerability

Other sources

Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

— Microsoft

Affected Software

19 affected componentsFixes available
All of the following
Any of the following
Microsoft .NET>=8.0.0<8.0.28
Microsoft .NET>=9.0.0<9.0.17
Microsoft .NET>=10.0.0<10.0.9
Microsoft Windows
alpine/dotnet10-runtime<10.0.9-r0
10.0.9-r0
alpine/dotnet10-runtime<10.0.9-r0
10.0.9-r0
alpine/dotnet8-runtime<8.0.28-r0
8.0.28-r0
alpine/dotnet8-runtime<8.0.28-r0
8.0.28-r0
alpine/dotnet8-runtime<8.0.28-r0
8.0.28-r0
alpine/dotnet9-runtime<9.0.17-r0
9.0.17-r0
alpine/dotnet9-runtime<9.0.17-r0
9.0.17-r0
alpine/dotnet9-runtime<9.0.17-r0
9.0.17-r0
alpine/dotnet9-runtime<9.0.17-r0
9.0.17-r0
All of the following
Microsoft .NET runtime>=9.0<9.0.17
9.0.17
Microsoft Windows*
All of the following
Microsoft .NET runtime>=8.0<8.0.28
8.0.28
Microsoft Windows*
All of the following
Microsoft .NET runtime>=10.0<10.0.9
10.0.9
Microsoft Windows*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.9Patch KB5097148
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 8.0.28Patch KB5097149
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 9.0.17Patch KB5097150
  4. Upgrade

    Upgrade alpine/dotnet10-runtime to a version that resolves this vulnerability.

    Fixed in 10.0.9-r0
  5. Upgrade

    Upgrade alpine/dotnet8-runtime to a version that resolves this vulnerability.

    Fixed in 8.0.28-r0
  6. Upgrade

    Upgrade alpine/dotnet9-runtime to a version that resolves this vulnerability.

    Fixed in 9.0.17-r0

Event History

Jun 9, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
CVE Published
via MITRE·05:04 PM
Data Sourced
via MITRE·05:04 PM
DescriptionSeverity
Data Sourced
via NVD·05:17 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·05:17 PM
DescriptionSeverityAffected Software
Data Sourced
via Red Hat·06:06 PM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-45490?

CVE-2026-45490 has a severity rating of high, with a score of 7.8.

2

How do I fix CVE-2026-45490?

To fix CVE-2026-45490, update your Microsoft .NET SDK to the latest version that addresses this vulnerability.

3

What impact does CVE-2026-45490 have on my system?

CVE-2026-45490 allows an authorized attacker to locally elevate their privileges, potentially compromising system security.

4

Which software versions are affected by CVE-2026-45490?

CVE-2026-45490 affects Microsoft .NET 8.0, 9.0, and 10.0 installed on Windows.

5

Who is vulnerable to CVE-2026-45490?

Any user with Microsoft .NET 8.0, 9.0, or 10.0 installed on Windows may be vulnerable to CVE-2026-45490.

Company

Resources

Contact

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