CVE-2026-40372
ASP.NET Core Elevation of Privilege Vulnerability
CVE-2026-40372 is fixed in 26 products on 2 platforms, first by aspnetcore-runtime-dbg-10.0 10.0.7-0ubuntu1~24.04.1, released April 20, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
9.1
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.1121
95th percentile
<p>Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| ASP.NET Core 10.0 | KB5091596 | Apr 21, 2026 | |
| Linux | |||
| aspnetcore-runtime-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.7-0ubuntu1~24.04.1 | aspnetcore-runtime-10.0 10.0.7-0ubuntu1~24.04.1 | May 15, 2026 |
| aspnetcore-runtime-10.0 · Ubuntu 25.10 (questing) | 10.0.7-0ubuntu1~25.10.1 | aspnetcore-runtime-10.0 10.0.7-0ubuntu1~25.10.1 | May 15, 2026 |
| aspnetcore-runtime-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.7-0ubuntu1~26.04.1 | aspnetcore-runtime-10.0 10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| aspnetcore-runtime-10.0 · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| aspnetcore-runtime-dbg-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.7-0ubuntu1~24.04.1 | aspnetcore-runtime-dbg-10.0 10.0.7-0ubuntu1~24.04.1 | Apr 20, 2026 |
| aspnetcore-runtime-dbg-10.0 · Ubuntu 25.10 (questing) | 10.0.7-0ubuntu1~25.10.1 | aspnetcore-runtime-dbg-10.0 10.0.7-0ubuntu1~25.10.1 | Apr 20, 2026 |
| aspnetcore-runtime-dbg-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.7-0ubuntu1~26.04.1 | aspnetcore-runtime-dbg-10.0 10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| aspnetcore-runtime-dbg-10.0 · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| aspnetcore-targeting-pack-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.7-0ubuntu1~24.04.1 | aspnetcore-targeting-pack-10.0 10.0.7-0ubuntu1~24.04.1 | May 15, 2026 |
| aspnetcore-targeting-pack-10.0 · Ubuntu 25.10 (questing) | 10.0.7-0ubuntu1~25.10.1 | aspnetcore-targeting-pack-10.0 10.0.7-0ubuntu1~25.10.1 | May 15, 2026 |
| aspnetcore-targeting-pack-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.7-0ubuntu1~26.04.1 | aspnetcore-targeting-pack-10.0 10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| aspnetcore-targeting-pack-10.0 · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-apphost-pack-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.7-0ubuntu1~24.04.1 | dotnet-apphost-pack-10.0 10.0.7-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet-apphost-pack-10.0 · Ubuntu 25.10 (questing) | 10.0.7-0ubuntu1~25.10.1 | dotnet-apphost-pack-10.0 10.0.7-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet-apphost-pack-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.7-0ubuntu1~26.04.1 | dotnet-apphost-pack-10.0 10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-apphost-pack-10.0 · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-apphost-pack-10.0-debuginfo · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-host · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-host-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.7-0ubuntu1~24.04.1 | dotnet-host-10.0 10.0.7-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet-host-10.0 · Ubuntu 25.10 (questing) | 10.0.7-0ubuntu1~25.10.1 | dotnet-host-10.0 10.0.7-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet-host-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.7-0ubuntu1~26.04.1 | dotnet-host-10.0 10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-host-debuginfo · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-hostfxr-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.7-0ubuntu1~24.04.1 | dotnet-hostfxr-10.0 10.0.7-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet-hostfxr-10.0 · Ubuntu 25.10 (questing) | 10.0.7-0ubuntu1~25.10.1 | dotnet-hostfxr-10.0 10.0.7-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet-hostfxr-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.7-0ubuntu1~26.04.1 | dotnet-hostfxr-10.0 10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-hostfxr-10.0 · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-hostfxr-10.0-debuginfo · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-runtime-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.7-0ubuntu1~24.04.1 | dotnet-runtime-10.0 10.0.7-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet-runtime-10.0 · Ubuntu 25.10 (questing) | 10.0.7-0ubuntu1~25.10.1 | dotnet-runtime-10.0 10.0.7-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet-runtime-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.7-0ubuntu1~26.04.1 | dotnet-runtime-10.0 10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-runtime-10.0 · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-runtime-10.0-debuginfo · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-runtime-dbg-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.7-0ubuntu1~24.04.1 | dotnet-runtime-dbg-10.0 10.0.7-0ubuntu1~24.04.1 | Apr 20, 2026 |
| dotnet-runtime-dbg-10.0 · Ubuntu 25.10 (questing) | 10.0.7-0ubuntu1~25.10.1 | dotnet-runtime-dbg-10.0 10.0.7-0ubuntu1~25.10.1 | Apr 20, 2026 |
| dotnet-runtime-dbg-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.7-0ubuntu1~26.04.1 | dotnet-runtime-dbg-10.0 10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-runtime-dbg-10.0 · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-sdk-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.107-0ubuntu1~24.04.1 | dotnet-sdk-10.0 10.0.107-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet-sdk-10.0 · Ubuntu 25.10 (questing) | 10.0.107-0ubuntu1~25.10.1 | dotnet-sdk-10.0 10.0.107-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet-sdk-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.107-0ubuntu1~26.04.1 | dotnet-sdk-10.0 10.0.107-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-sdk-10.0 · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-sdk-10.0-debuginfo · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-sdk-10.0-source-built-artifacts · Ubuntu 24.04.5 LTS (noble) | 10.0.107-0ubuntu1~24.04.1 | dotnet-sdk-10.0-source-built-artifacts 10.0.107-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet-sdk-10.0-source-built-artifacts · Ubuntu 25.10 (questing) | 10.0.107-0ubuntu1~25.10.1 | dotnet-sdk-10.0-source-built-artifacts 10.0.107-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet-sdk-10.0-source-built-artifacts · Ubuntu 26.04.1 LTS (resolute) | 10.0.107-0ubuntu1~26.04.1 | dotnet-sdk-10.0-source-built-artifacts 10.0.107-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-sdk-10.0-source-built-artifacts · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-sdk-aot-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.107-0ubuntu1~24.04.1 | dotnet-sdk-aot-10.0 10.0.107-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet-sdk-aot-10.0 · Ubuntu 25.10 (questing) | 10.0.107-0ubuntu1~25.10.1 | dotnet-sdk-aot-10.0 10.0.107-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet-sdk-aot-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.107-0ubuntu1~26.04.1 | dotnet-sdk-aot-10.0 10.0.107-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-sdk-aot-10.0 · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-sdk-aot-10.0-debuginfo · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-sdk-dbg-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.107-0ubuntu1~24.04.1 | dotnet-sdk-dbg-10.0 10.0.107-0ubuntu1~24.04.1 | Apr 20, 2026 |
| dotnet-sdk-dbg-10.0 · Ubuntu 25.10 (questing) | 10.0.107-0ubuntu1~25.10.1 | dotnet-sdk-dbg-10.0 10.0.107-0ubuntu1~25.10.1 | Apr 20, 2026 |
| dotnet-sdk-dbg-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.107-0ubuntu1~26.04.1 | dotnet-sdk-dbg-10.0 10.0.107-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-sdk-dbg-10.0 · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-targeting-pack-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.7-0ubuntu1~24.04.1 | dotnet-targeting-pack-10.0 10.0.7-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet-targeting-pack-10.0 · Ubuntu 25.10 (questing) | 10.0.7-0ubuntu1~25.10.1 | dotnet-targeting-pack-10.0 10.0.7-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet-targeting-pack-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.7-0ubuntu1~26.04.1 | dotnet-targeting-pack-10.0 10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-targeting-pack-10.0 · amzn 2023 | 10.0.7-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet-templates-10.0 · Ubuntu 24.04.5 LTS (noble) | 10.0.107-0ubuntu1~24.04.1 | dotnet-templates-10.0 10.0.107-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet-templates-10.0 · Ubuntu 25.10 (questing) | 10.0.107-0ubuntu1~25.10.1 | dotnet-templates-10.0 10.0.107-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet-templates-10.0 · Ubuntu 26.04.1 LTS (resolute) | 10.0.107-0ubuntu1~26.04.1 | dotnet-templates-10.0 10.0.107-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet-templates-10.0 · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet10 · Ubuntu 24.04.5 LTS (noble) | 10.0.107-10.0.7-0ubuntu1~24.04.1 | dotnet10 10.0.107-10.0.7-0ubuntu1~24.04.1 | May 15, 2026 |
| dotnet10 · Ubuntu 25.10 (questing) | 10.0.107-10.0.7-0ubuntu1~25.10.1 | dotnet10 10.0.107-10.0.7-0ubuntu1~25.10.1 | May 15, 2026 |
| dotnet10 · Ubuntu 26.04.1 LTS (resolute) | 10.0.107-10.0.7-0ubuntu1~26.04.1 | dotnet10 10.0.107-10.0.7-0ubuntu1~26.04.1 | Jul 14, 2026 |
| dotnet10.0-debuginfo · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
| dotnet10.0-debugsource · amzn 2023 | 10.0.107-1.amzn2023.0.1 | ALAS2023-2026-1634 | Apr 27, 2026 |
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