CVE-2026-45490

.NET SDK Elevation of Privilege Vulnerability

7.8 HighFix available

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

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.38%Up 0.3 points since Jun 10, 2026

What each source reports

CVE List Score used 7.8

.NET SDK Elevation of Privilege Vulnerability

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

Record: CVE-2026-45490
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-285, CWE-266
Updated: 2026-11-02

EUVDEUVD-2026-35674 7.8

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

Record: EUVD-2026-35674
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Updated: 2026-11-02

GitHub AdvisoriesGHSA-77gm-m6x5-jf4f 7.8

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

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

Record: GHSA-77gm-m6x5-jf4f
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-266, CWE-285, CWE-863
Updated: 2026-11-02

NVD 7.8

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

Record: CVE-2026-45490
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-285, CWE-863, CWE-266
Updated: 2026-11-02

OSVALPINE-CVE-2026-45490 7.8

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

Record: ALPINE-CVE-2026-45490
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

OSV 7.8

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

Record: CVE-2026-45490
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-45490 7.8

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

Record: UBUNTU-CVE-2026-45490
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVBIT-dotnet-2026-45490 No score

.NET SDK Elevation of Privilege Vulnerability

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

Record: BIT-dotnet-2026-45490
Updated: 2026-11-02

OSVBIT-dotnet-sdk-2026-45490 No score

.NET SDK Elevation of Privilege Vulnerability

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

Record: BIT-dotnet-sdk-2026-45490
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`dotnet10-runtime` Alpine:v3.23	before 10.0.9-r0	10.0.9-r0
`dotnet10-runtime` Alpine:v3.24	before 10.0.9-r0	10.0.9-r0
`dotnet8-runtime` Alpine:v3.22	before 8.0.28-r0	8.0.28-r0
`dotnet8-runtime` Alpine:v3.23	before 8.0.28-r0	8.0.28-r0
`dotnet8-runtime` Alpine:v3.24	before 8.0.28-r0	8.0.28-r0
`dotnet9-runtime` Alpine:v3.21	before 9.0.17-r0	9.0.17-r0
`dotnet9-runtime` Alpine:v3.22	before 9.0.17-r0	9.0.17-r0
`dotnet9-runtime` Alpine:v3.23	before 9.0.17-r0	9.0.17-r0
`dotnet9-runtime` Alpine:v3.24	before 9.0.17-r0	9.0.17-r0
`dotnet` Bitnami	8.0.0 up to 8.0.28, 9.0.0 up to 9.0.17, 10.0.0 up to 10.0.9	8.0.289.0.1710.0.9
`dotnet-sdk` Bitnami	8.0.0 up to 8.0.28, 9.0.0 up to 9.0.17, 10.0.0 up to 10.0.9	8.0.289.0.1710.0.9
`dotnet7` Ubuntu:22.04:LTS	All versions, plus listed versions 7.0.105-0ubuntu1~22.04.17.0.107-0ubuntu1~22.04.17.0.108-0ubuntu1~22.04.17.0.109-0ubuntu1~22.04.17.0.110-0ubuntu1~22.04.1 Show 9 moreShow less 7.0.111-0ubuntu1~22.04.17.0.112-0ubuntu1~22.04.17.0.113-0ubuntu1~22.04.17.0.114-0ubuntu1~22.04.17.0.115-0ubuntu1~22.04.17.0.116-0ubuntu1~22.04.17.0.117-0ubuntu1~22.04.17.0.117-0ubuntu1~22.04.27.0.119-0ubuntu1~22.04.1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected, aliases, references	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-45490 is a high vulnerability (CVSS 7.8) in Microsoft .net, published June 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 32nd percentile. Fixed in dotnet10-runtime 10.0.9-r0.

References

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