CVE-2026-50650: Microsoft Security Advisory CVE-2026-50650 – .NET Elevation of Privilege Vulnerability

July 21, 2026

Microsoft is releasing this security advisory to provide information about a vulnerability in Windows Presentation Foundation (WPF). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

An elevation of privilege vulnerability exists in Windows Presentation Foundation (WPF) in .NET 8, .NET 9, and .NET 10 when parsing specially crafted XAML input. An attacker who successfully exploits this vulnerability could elevate privileges on the affected system.

References

github.com/advisories/GHSA-2969-4q4w-w5h3
github.com/dotnet/announcements/issues/421
github.com/dotnet/wpf/issues/11784
github.com/dotnet/wpf/security/advisories/GHSA-2969-4q4w-w5h3
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50650
nvd.nist.gov/vuln/detail/CVE-2026-50650

Code Behaviors & Features

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