Improper Encoding or Escaping of Output in Microsoft products - CVE-2026-50659
Published: July 17, 2026
Vulnerability identifier: #VU138088
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-50659
CWE-ID: CWE-116
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
.NET
.NET for Linux
.NET for macOS
Visual Studio
.NET
.NET for Linux
.NET for macOS
Visual Studio
Detailed vulnerability description
The vulnerability allows a remote user to perform spoofing.
The vulnerability exists due to improper encoding or escaping of output in .NET for macOS when handling network requests. A remote user can send crafted input to perform spoofing.
How to mitigate CVE-2026-50659
Install security update from vendor's website.