Microsoft Security Advisory CVE-2026-45591 – ASP.NET Core Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core SignalR and Blazor Server. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service...

GHSA-F8H2-VMM9-QHJ6 Microsoft Security Advisory CVE-2026-45591 – ASP.NET Core Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core SignalR and Blazor Server. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service...

KLA91000 Multiple vulnerabilities in Microsoft Azure

Multiple vulnerabilities were found in Microsoft Azure. Malicious users can exploit these vulnerabilities to obtain sensitive information, bypass security restrictions, gain privileges. Below is a complete list of vulnerabilities: 1. An information disclosure vulnerability in Azure SRE Agent can ...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : .NET vulnerabilities (USN-8085-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8085-1 advisory. It was discovered that the .NET Microsoft.Bcl.Memory NuGet package did not properly handle certain malformed Base64Url encoded input...

Microsoft ASP.NET Core DoS (March 2026)

The version of ASP.NET Core installed on the remote Windows host is 8.0.x prior to 8.0.25, 9.0.x prior to 9.0.14, or 10.0.x prior to 10.0.4. It is, therefore, affected by a denial of service vulnerability. A specially crafted message to a SignalR server can cause uncontrolled resource consumption...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.linux-musl-arm is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.linux-arm is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling ...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.linux-musl-x64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.linux-x64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling ...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the SignalR service. An attacker can exhaust internal buffers and cause service disruption by sending malicious messages. Remediation Upgrade...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.win-x64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.win-arm64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling ...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.win-x86 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.linux-arm64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttlin...

Allocation of Resources Without Limits or Throttling

Overview Microsoft.AspNetCore.App.Runtime.osx-x64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in...

.NET Denial of Service Vulnerability

Microsoft Security Advisory CVE-2026-26130 – .NET Denial of Service Vulnerability Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0, .NET 9.0, and .NET 10.0. This advisory also provides guidance on what developers can do to...

GHSA-4VGM-C2WM-63MW .NET Denial of Service Vulnerability

Microsoft Security Advisory CVE-2026-26130 – .NET Denial of Service Vulnerability Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0, .NET 9.0, and .NET 10.0. This advisory also provides guidance on what developers can do to...

USN-8085-1: .NET vulnerabilities

It was discovered that the .NET Microsoft.Bcl.Memory NuGet package did not properly handle certain malformed Base64Url encoded input. An attacker could possibly use this issue to cause .NET to crash, resulting in a denial of service. This issue only affected .NET 9.0 and .NET 10.0. CVE-2026-26127...

USN-8085-1 dotnet8, dotnet9, dotnet10 vulnerabilities

It was discovered that the .NET Microsoft.Bcl.Memory NuGet package did not properly handle certain malformed Base64Url encoded input. An attacker could possibly use this issue to cause .NET to crash, resulting in a denial of service. This issue only affected .NET 9.0 and .NET 10.0. CVE-2026-26127...