Is CVE-2026-50528 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-50528 being exploited in the wild.

How severe is CVE-2026-50528?

High severity, with a CVSS score of 8.2, published 14 July 2026.

Which products and versions are affected?

Microsoft .NET Core App Runtime 8.0.0 - 8.0.28, 9.0.0 - 9.0.17, 10.0.0 - 10.0.9; 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; and 10 more.

How is CVE-2026-50528 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-50528?

Check whether you run Microsoft .NET Core App Runtime, Microsoft Visual Studio 2022, Microsoft.NetCore.App.Runtime.linux-arm (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.

CVE-2026-50528: Microsoft .NET incorrect authorization security bypass

CVE-2026-50528 · Severity: high · CVSS 8.2 · Published 2026-07-14

A security vulnerability has been identified in Microsoft .NET, a widely used framework for building and running applications. The flaw exists in how the system handles secure encrypted connections (TLS/SSL), potentially allowing an attacker to bypass security checks that verify if a user or system is authorized to perform certain actions. This could lead to unauthorized access to sensitive data or functions within affected applications.

Quick answers

Is CVE-2026-50528 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-50528 being exploited in the wild.
How severe is CVE-2026-50528?: High severity, with a CVSS score of 8.2, published 14 July 2026.
Which products and versions are affected?: Microsoft .NET Core App Runtime 8.0.0 - 8.0.28, 9.0.0 - 9.0.17, 10.0.0 - 10.0.9; 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; and 10 more.
Is there a fix for CVE-2026-50528?: 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-2026-50528 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-50528?: Check whether you run Microsoft .NET Core App Runtime, Microsoft Visual Studio 2022, Microsoft.NetCore.App.Runtime.linux-arm (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

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

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

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

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

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

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

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

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

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

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

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

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

Technical details

This vulnerability is classified as an Incorrect Authorization (CWE-863) issue within the System.Net.Security namespace of .NET. The root cause lies in the SslStream implementation, which fails to properly enforce authorization checks during the processing of TLS/SSL connections. An unauthenticated remote attacker can exploit this flaw over the network without user interaction to bypass security features. The vulnerability affects .NET 8, 9, and 10 across all supported platforms and architectures. Microsoft has released patches in versions 8.0.29, 9.0.18, and 10.0.10. Developers using self-contained deployments must recompile and redeploy their applications to incorporate the fix.

Affected products

Microsoft .NET Core App Runtime 8.0.0 - 8.0.28, 9.0.0 - 9.0.17, 10.0.0 - 10.0.9

Identifiers

CVE-2026-50528
GHSA-qvw7-jm5c-6hqw

Timeline

2026-07-14: advisory: Initial advisory publication
2026-07-20: patched: Updated advisory with patched version details

References

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