Path traversal in .NET and Visual Studio - CVE-2026-32175

Vulnerability identifier: #VU131366

CSH Severity: Medium

CVSS v4: 5.3 [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]

CVE-ID: CVE-2026-32175

CWE-ID: CWE-22

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in .NET Core. A remote user can send a specially crafted HTTP request and write arbitrary files on the system.

.NET
Visual Studio
Fedora
dotnet8.0
dotnet9.0
dotnet10.0

Install updates from vendor's website.

.NET - addressed in versions 8.0.27, 9.0.16
Visual Studio - addressed in versions 15.9.80, 16.11.56, 17.12.20
dotnet8.0 - addressed in versions 8.0.127-1.fc42, 8.0.127-1.fc43, 8.0.127-1.fc44
dotnet9.0 - addressed in versions 9.0.117-1.fc42, 9.0.117-1.fc43, 9.0.117-1.fc44
dotnet10.0 - addressed in versions 10.0.108-1.fc42, 10.0.108-1.fc43, 10.0.108-1.fc44

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32175

• Path traversal in Microsoft .NET Core
• Fedora 42 update for dotnet9.0
• Fedora 43 update for dotnet9.0
• Fedora 44 update for dotnet9.0
• Fedora 42 update for dotnet10.0
• Fedora 43 update for dotnet10.0
• Fedora 44 update for dotnet10.0
• Fedora 42 update for dotnet8.0
• Fedora 43 update for dotnet8.0
• Fedora 44 update for dotnet8.0