Allocation of Resources Without Limits or Throttling in ASP.NET Core and Visual Studio - CVE-2025-26682

Vulnerability identifier: #VU107240

CSH Severity: High

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-26682

CWE-ID: CWE-770

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to allocation of resources without limits or throttling in ASP.NET Core and Visual Studio. A remote attacker can cause a denial of service condition on the target system.

ASP.NET Core
Visual Studio
Ubuntu
dotnet-hostfxr-8.0 (Ubuntu package)
dotnet-host-8.0 (Ubuntu package)
aspnetcore-runtime-8.0 (Ubuntu package)
dotnet-runtime-8.0 (Ubuntu package)
dotnet-sdk-8.0 (Ubuntu package)
dotnet8 (Ubuntu package)
dotnet-hostfxr-9.0 (Ubuntu package)
dotnet-host-9.0 (Ubuntu package)
aspnetcore-runtime-9.0 (Ubuntu package)
dotnet-runtime-9.0 (Ubuntu package)
dotnet9 (Ubuntu package)
dotnet-sdk-9.0 (Ubuntu package)
dotnet-sdk-aot-9.0 (Ubuntu package)

Install update from vendor's website.

ASP.NET Core - addressed in versions 8.0.16 8.0.16, 9.0.5 9.0.5
Visual Studio - addressed in versions 17.8.20 17.8.20, 17.10.13 17.10.13, 17.12.7 17.12.7, 17.13.6 17.13.6
dotnet-hostfxr-8.0 (Ubuntu package) - addressed in versions 8.0.15-0ubuntu1~22.04.1, 8.0.15-0ubuntu1~24.04.1, 8.0.15-0ubuntu1~24.10.1
dotnet-host-8.0 (Ubuntu package) - addressed in versions 8.0.15-0ubuntu1~22.04.1, 8.0.15-0ubuntu1~24.04.1, 8.0.15-0ubuntu1~24.10.1
aspnetcore-runtime-8.0 (Ubuntu package) - addressed in versions 8.0.15-0ubuntu1~22.04.1, 8.0.15-0ubuntu1~24.04.1, 8.0.15-0ubuntu1~24.10.1
dotnet-runtime-8.0 (Ubuntu package) - addressed in versions 8.0.15-0ubuntu1~22.04.1, 8.0.15-0ubuntu1~24.04.1, 8.0.15-0ubuntu1~24.10.1
dotnet-sdk-8.0 (Ubuntu package) - addressed in versions 8.0.115-0ubuntu1~22.04.1, 8.0.115-0ubuntu1~24.04.1, 8.0.115-0ubuntu1~24.10.1
dotnet8 (Ubuntu package) - addressed in versions 8.0.115-8.0.15-0ubuntu1~22.04.1, 8.0.115-8.0.15-0ubuntu1~24.04.1, 8.0.115-8.0.15-0ubuntu1~24.10.1
dotnet-hostfxr-9.0 (Ubuntu package) - update to 9.0.4-0ubuntu1~24.10.1
dotnet-host-9.0 (Ubuntu package) - update to 9.0.4-0ubuntu1~24.10.1
aspnetcore-runtime-9.0 (Ubuntu package) - update to 9.0.4-0ubuntu1~24.10.1
dotnet-runtime-9.0 (Ubuntu package) - update to 9.0.4-0ubuntu1~24.10.1
dotnet9 (Ubuntu package) - update to 9.0.105-9.0.4-0ubuntu1~24.10.1
dotnet-sdk-9.0 (Ubuntu package) - update to 9.0.105-0ubuntu1~24.10.1
dotnet-sdk-aot-9.0 (Ubuntu package) - update to 9.0.105-0ubuntu1~24.10.1

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26682

• Denial of service in Microsoft ASP.NET Core and Visual Studio
• Ubuntu update for dotnet8, dotnet9