Description
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | .NET 10.0 installed on Windows | 10.0.0 – < 10.0.15 | 10.0.15 |
| Microsoft | .NET 8.0 installed on Windows | 8.0.0 – < 8.0.34 | 8.0.34 |
| Microsoft | .NET 9.0 installed on Windows | 9.0.0 – < 9.0.23 | 9.0.23 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – < 17.14.45 | 17.14.45 |
| Microsoft | Microsoft Visual Studio 2026 version 18.11 | 18.11.0 – < 18.11.4 | 18.11.4 |
| Microsoft | Microsoft Visual Studio 2026 version 18.12 | 18.12.0 – < 18.12.0 | 18.12.0 |
| Microsoft | Microsoft.AspNetCore.Server.HttpSys | 2.3.10 – < 2.3.14 | 2.3.14 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | dotnet7 | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet10-runtime | 10.0.15-r0 | — |
| Alpine v3.24 | dotnet8-runtime | 8.0.34-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.23-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.34-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.23-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.34-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.23-r0 | — |
Affected packages
Advisories 3
- WID-SEC-2026-4481 Microsoft Developer Tools: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- MSRC-CVE-2026-114154 ASP.NET Core Denial of Service Vulnerability Microsoft Security Response Center · Nov 11, 2026
- NCSC-2026-0473 Kwetsbaarheden verholpen in Microsoft Developer Tools NCSC-NL (Netherlands) · Nov 10, 2026
References
- ASP.NET Core Denial of Service Vulnerability vendor-advisory patch