# CVE-2026-50524: Microsoft .NET Framework denial of service via improper input validation

Source: https://junglewise.ai/threats/cve-2026-50524-microsoft-net-framework-denial-of-service-via-improper-input  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-20  
License: CC BY 4.0 with a link back

CVE-2026-50524 · Severity: high · CVSS 7.5 · Published 2026-07-14

A security vulnerability has been identified in Microsoft .NET, a widely used framework for building and running applications. This flaw affects how the system handles secure web connections (TLS/SSL handshakes). An attacker could exploit this to crash an application or make it unresponsive, leading to a denial of service. Organizations should update their .NET runtimes and SDKs to the latest patched versions to maintain service availability.

Technologies: [Microsoft Visual Studio 2022](https://junglewise.ai/threats/technologies/visual-studio-2022), [Microsoft.NetCore.App.Runtime.linux-arm (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-linux-arm), [Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-linux-arm64), [Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-linux-musl-arm), [Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-linux-musl-arm64), [Microsoft.NetCore.App.Runtime.linux-musl-x64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-linux-musl-x64), [Microsoft.NetCore.App.Runtime.linux-x64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-linux-x64), [Microsoft.NetCore.App.Runtime.osx-arm64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-osx-arm64), [Microsoft.NetCore.App.Runtime.osx-x64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-osx-x64), [Microsoft.NetCore.App.Runtime.win-arm (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-win-arm), [Microsoft.NetCore.App.Runtime.win-arm64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-win-arm64), [Microsoft.NetCore.App.Runtime.win-x64 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-win-x64), [Microsoft.NetCore.App.Runtime.win-x86 (NuGet)](https://junglewise.ai/threats/technologies/microsoft-netcore-app-runtime-win-x86). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft), [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is CVE-2026-50524 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50524 being exploited in the wild.

**How severe is CVE-2026-50524?** High severity, with a CVSS score of 7.5, published 14 July 2026.

**Which products and versions are affected?** Microsoft Visual Studio 2022 17.12.0 to 17.12.22; Microsoft.NetCore.App.Runtime.linux-arm (NuGet) ECOSYSTEM:introduced=10.0.0,fixed=10.0.10; Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) ECOSYSTEM:introduced=10.0.0,fixed=10.0.10; Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet) ECOSYSTEM:introduced=10.0.0,fixed=10.0.10; and 9 more.

**Is there a fix for CVE-2026-50524?** Yes. Microsoft.NetCore.App.Runtime.linux-arm (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.linux-x64 (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.osx-x64 (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.win-arm (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.win-arm64 (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.win-x64 (NuGet): upgrade to 10.0.10 or later; Microsoft.NetCore.App.Runtime.win-x86 (NuGet): upgrade to 10.0.10 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-50524 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-50524?** Check whether you run Microsoft Visual Studio 2022, Microsoft.NetCore.App.Runtime.linux-arm (NuGet), Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Microsoft.NetCore.App.Runtime.linux-arm (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.linux-arm --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.linux-arm64 --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.linux-musl-arm --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.linux-musl-arm64 --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.linux-musl-x64 --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.linux-x64 (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.linux-x64 --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.osx-arm64 --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.osx-x64 (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.osx-x64 --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.win-arm (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.win-arm --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.win-arm64 (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.win-arm64 --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.win-x64 (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.win-x64 --version 10.0.10
  ```

- Microsoft.NetCore.App.Runtime.win-x86 (NuGet): upgrade to 10.0.10 or later

  ```sh
  dotnet add package Microsoft.NetCore.App.Runtime.win-x86 --version 10.0.10
  ```


## Technical details

A denial of service (DoS) vulnerability exists in the .NET TLS/SSL implementation within the System.Net.Security namespace. The issue is classified as an improper validation of specified type of input (CWE-1287). An unauthenticated remote attacker can trigger this vulnerability by sending malformed requests during the TLS handshake process. Successful exploitation causes the affected application to crash or become unresponsive. The vulnerability impacts .NET 8, 9, and 10 across all platforms and architectures. Microsoft has released patches in versions 8.0.29, 9.0.18, and 10.0.10.

## Affected products

- Microsoft .NET 8.0.0 - 8.0.28, 9.0.0 - 9.0.17, 10.0.0 - 10.0.9

## Identifiers

- CVE-2026-50524
- GHSA-w7cw-xp7h-6j5j

## Timeline

- 2026-07-14: disclosed
- 2026-07-14: patched
- 2026-07-20: advisory

## References

- [https://github.com/dotnet/runtime/security/advisories/GHSA-w7cw-xp7h-6j5j](https://github.com/dotnet/runtime/security/advisories/GHSA-w7cw-xp7h-6j5j)
- [https://github.com/dotnet/announcements/issues/413](https://github.com/dotnet/announcements/issues/413)
- [https://github.com/dotnet/runtime/issues/130710](https://github.com/dotnet/runtime/issues/130710)
- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50524](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50524)
- [https://api.github.com/repos/dotnet/runtime/security-advisories/GHSA-w7cw-xp7h-6j5j](https://api.github.com/repos/dotnet/runtime/security-advisories/GHSA-w7cw-xp7h-6j5j)

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