Vulnerability · Published Jul 14, 2026 · Assigned by microsoft
CVE-2026-47300ASP.NET Core Elevation of Privilege Vulnerability
High 8.8
In plain English
A high-severity security flaw in Microsoft Visual Studio 2022 version 17.12 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 44.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | aspnetcore-runtime-10.0 | 10.0.10-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | aspnetcore-runtime-10.0 | 10.0.10-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | aspnetcore-runtime-10.0 | 10.0.10-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | aspnetcore-runtime-8.0 | 8.0.29-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | aspnetcore-runtime-8.0 | 8.0.29-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | aspnetcore-runtime-8.0 | 8.0.29-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | aspnetcore-runtime-9.0 | 9.0.18-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | aspnetcore-runtime-9.0 | 9.0.18-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | aspnetcore-runtime-9.0 | 9.0.18-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-10.0 | 10.0.10-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-10.0 | 10.0.10-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-10.0 | 10.0.10-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-8.0 | 8.0.29-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-8.0 | 8.0.29-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-8.0 | 8.0.29-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-9.0 | 9.0.18-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-9.0 | 9.0.18-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-9.0 | 9.0.18-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | aspnetcore-targeting-pack-10.0 | 10.0.10-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | aspnetcore-targeting-pack-10.0 | 10.0.10-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | aspnetcore-targeting-pack-10.0 | 10.0.10-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | aspnetcore-targeting-pack-8.0 | 8.0.29-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | aspnetcore-targeting-pack-8.0 | 8.0.29-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | aspnetcore-targeting-pack-8.0 | 8.0.29-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | aspnetcore-targeting-pack-9.0 | 9.0.18-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | aspnetcore-targeting-pack-9.0 | 9.0.18-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | aspnetcore-targeting-pack-9.0 | 9.0.18-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:8 | dotnet | 10.0.110-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:10 | dotnet-apphost-pack-10.0 | 10.0.10-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-apphost-pack-10.0 | 10.0.10-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-apphost-pack-10.0 | 10.0.10-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-apphost-pack-8.0 | 8.0.29-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | dotnet-apphost-pack-8.0 | 8.0.29-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | dotnet-apphost-pack-8.0 | 8.0.29-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | dotnet-apphost-pack-9.0 | 9.0.18-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-apphost-pack-9.0 | 9.0.18-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-apphost-pack-9.0 | 9.0.18-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | dotnet-host | 10.0.10-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-host | 10.0.10-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-host | 10.0.10-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-hostfxr-10.0 | 10.0.10-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-hostfxr-10.0 | 10.0.10-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-hostfxr-10.0 | 10.0.10-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-hostfxr-8.0 | 8.0.29-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | dotnet-hostfxr-8.0 | 8.0.29-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | dotnet-hostfxr-8.0 | 8.0.29-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | dotnet-hostfxr-9.0 | 9.0.18-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-hostfxr-9.0 | 9.0.18-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-hostfxr-9.0 | 9.0.18-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | dotnet-runtime-10.0 | 10.0.10-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-runtime-10.0 | 10.0.10-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-runtime-10.0 | 10.0.10-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-runtime-8.0 | 8.0.29-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | dotnet-runtime-8.0 | 8.0.29-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | dotnet-runtime-8.0 | 8.0.29-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | dotnet-runtime-9.0 | 9.0.18-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-runtime-9.0 | 9.0.18-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-runtime-9.0 | 9.0.18-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | dotnet-runtime-dbg-10.0 | 10.0.10-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-runtime-dbg-10.0 | 10.0.10-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-runtime-dbg-10.0 | 10.0.10-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-runtime-dbg-8.0 | 8.0.29-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | dotnet-runtime-dbg-8.0 | 8.0.29-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | dotnet-runtime-dbg-8.0 | 8.0.29-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | dotnet-runtime-dbg-9.0 | 9.0.18-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-runtime-dbg-9.0 | 9.0.18-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-runtime-dbg-9.0 | 9.0.18-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | dotnet-sdk-10.0 | 10.0.110-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-sdk-10.0 | 10.0.110-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-sdk-10.0 | 10.0.110-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-sdk-10.0-source-built-artifacts | 10.0.110-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-sdk-10.0-source-built-artifacts | 10.0.110-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-sdk-10.0-source-built-artifacts | 10.0.110-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-sdk-8.0 | 8.0.129-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | dotnet-sdk-8.0 | 8.0.129-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | dotnet-sdk-8.0 | 8.0.129-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | dotnet-sdk-8.0-source-built-artifacts | 8.0.129-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | dotnet-sdk-8.0-source-built-artifacts | 8.0.129-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | dotnet-sdk-8.0-source-built-artifacts | 8.0.129-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | dotnet-sdk-9.0 | 9.0.119-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-sdk-9.0 | 9.0.119-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-sdk-9.0 | 9.0.119-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | dotnet-sdk-9.0-source-built-artifacts | 9.0.119-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-sdk-9.0-source-built-artifacts | 9.0.119-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-sdk-9.0-source-built-artifacts | 9.0.119-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | dotnet-sdk-aot-10.0 | 10.0.110-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-sdk-aot-10.0 | 10.0.110-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-sdk-aot-10.0 | 10.0.110-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-sdk-aot-9.0 | 9.0.119-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-sdk-aot-9.0 | 9.0.119-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-sdk-aot-9.0 | 9.0.119-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | dotnet-sdk-dbg-10.0 | 10.0.110-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-sdk-dbg-10.0 | 10.0.110-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-sdk-dbg-10.0 | 10.0.110-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-sdk-dbg-8.0 | 8.0.129-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | dotnet-sdk-dbg-8.0 | 8.0.129-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | dotnet-sdk-dbg-8.0 | 8.0.129-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | dotnet-sdk-dbg-9.0 | 9.0.119-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-sdk-dbg-9.0 | 9.0.119-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-sdk-dbg-9.0 | 9.0.119-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | dotnet-targeting-pack-10.0 | 10.0.10-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-targeting-pack-10.0 | 10.0.10-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-targeting-pack-10.0 | 10.0.10-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-targeting-pack-8.0 | 8.0.29-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | dotnet-targeting-pack-8.0 | 8.0.29-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | dotnet-targeting-pack-8.0 | 8.0.29-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | dotnet-targeting-pack-9.0 | 9.0.18-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-targeting-pack-9.0 | 9.0.18-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-targeting-pack-9.0 | 9.0.18-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | dotnet-templates-10.0 | 10.0.110-1.el10_2 | ALSA-2026:41897 |
| AlmaLinux:8 | dotnet-templates-10.0 | 10.0.110-1.el8_10 | ALSA-2026:41900 |
| AlmaLinux:9 | dotnet-templates-10.0 | 10.0.110-1.el9_8 | ALSA-2026:41898 |
| AlmaLinux:10 | dotnet-templates-8.0 | 8.0.129-1.el10_2 | ALSA-2026:41893 |
| AlmaLinux:8 | dotnet-templates-8.0 | 8.0.129-1.el8_10 | ALSA-2026:41901 |
| AlmaLinux:9 | dotnet-templates-8.0 | 8.0.129-1.el9_8 | ALSA-2026:41894 |
| AlmaLinux:10 | dotnet-templates-9.0 | 9.0.119-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | dotnet-templates-9.0 | 9.0.119-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | dotnet-templates-9.0 | 9.0.119-1.el9_8 | ALSA-2026:41896 |
| AlmaLinux:10 | netstandard-targeting-pack-2.1 | 9.0.119-1.el10_2 | ALSA-2026:41895 |
| AlmaLinux:8 | netstandard-targeting-pack-2.1 | 9.0.119-1.el8_10 | ALSA-2026:41899 |
| AlmaLinux:9 | netstandard-targeting-pack-2.1 | 9.0.119-1.el9_8 | ALSA-2026:41896 |
| Alpine:v3.23 | dotnet10-runtime | 10.0.10-r0 | ALPINE-CVE-2026-47300 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.10-r0 | ALPINE-CVE-2026-47300 |
| Alpine:v3.22 | dotnet8-runtime | 8.0.29-r0 | ALPINE-CVE-2026-47300 |
| Alpine:v3.23 | dotnet8-runtime | 8.0.29-r0 | ALPINE-CVE-2026-47300 |
| Alpine:v3.24 | dotnet8-runtime | 8.0.29-r0 | ALPINE-CVE-2026-47300 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.18-r0 | ALPINE-CVE-2026-47300 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.18-r0 | ALPINE-CVE-2026-47300 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.18-r0 | ALPINE-CVE-2026-47300 |
| NuGet | microsoft.aspnetcore.authentication.negotiate | 9.0.18 | GHSA-8prm-248r-h957 |
| NuGet | microsoft.aspnetcore.authentication.negotiate | 10.0.10 | GHSA-8prm-248r-h957 |
| NuGet | microsoft.aspnetcore.authentication.negotiate | 8.0.29 | GHSA-8prm-248r-h957 |
| Rocky Linux:10 | dotnet10.0 | 0:10.0.110-1.el10_2 | RLSA-2026:41897 |
| Rocky Linux:8 | dotnet10.0 | 0:10.0.110-1.el8_10 | RLSA-2026:41900 |
| Rocky Linux:9 | dotnet10.0 | 0:10.0.110-1.el9_8 | RLSA-2026:41898 |
| Rocky Linux:10 | dotnet8.0 | 0:8.0.129-1.el10_2 | RLSA-2026:41893 |
| Rocky Linux:8 | dotnet8.0 | 0:8.0.129-1.el8_10 | RLSA-2026:41901 |
| Rocky Linux:9 | dotnet8.0 | 0:8.0.129-1.el9_8 | RLSA-2026:41894 |
| Rocky Linux:10 | dotnet9.0 | 0:9.0.119-1.el10_2 | RLSA-2026:41895 |
| Rocky Linux:8 | dotnet9.0 | 0:9.0.119-1.el8_10 | RLSA-2026:41899 |
| Rocky Linux:9 | dotnet9.0 | 0:9.0.119-1.el9_8 | RLSA-2026:41896 |
| Ubuntu:24.04:LTS | dotnet10 | 10.0.110-10.0.10-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-47300 |
| Ubuntu:26.04:LTS | dotnet10 | 10.0.110-10.0.10-0ubuntu1~26.04.1 | UBUNTU-CVE-2026-47300 |
| Ubuntu:22.04:LTS | dotnet6 | no fix listed | UBUNTU-CVE-2026-47300 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-47300 |
| Ubuntu:22.04:LTS | dotnet8 | 8.0.129-8.0.29-0ubuntu1~22.04.1 | UBUNTU-CVE-2026-47300 |
| Ubuntu:24.04:LTS | dotnet8 | 8.0.129-8.0.29-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-47300 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 10.0 runtime | 10.0.0 – before 10.0.10 |
| Microsoft | .NET 8.0 runtime | 8.0.0 – before 8.0.29 |
| Microsoft | .NET 9.0 runtime | 9.0.0 – before 9.0.18 |
| Microsoft | Microsoft Visual Studio 2022 version 17.12 | 17.12.0 – before 17.12.22 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – before 17.14.36 |
| Microsoft | Microsoft Visual Studio 2026 version 18.7 | 18.0 – before 18.7.4 |
Weakness: CWE-303 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- ASP.NET Core Elevation of Privilege Vulnerability vendor-advisory, patch