CVE-2018-8416 Tampering vulnerability in .NET Core
Attackers can tamper with data by exploiting improper handling of specially crafted files in the .NET Core runtime.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-8416?
CVE-2018-8416 is a medium-severity vulnerability in Microsoft .NET Core, published on 14 Nov 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A tampering vulnerability exists when .NET Core improperly handles specially crafted files, aka ".NET Core Tampering Vulnerability." This affects .NET Core 2.1.
Which versions are affected by CVE-2018-8416?
2 open source packages ship an affected version, including Microsoft.NETCore.App. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
Microsoft.NETCore.App NuGet | From 2.1.0 | 2.1.7 |
Microsoft.NETCore.App NuGet | From 2.1.0 | 2.1.7 |
Linux distribution packages (6)
rh-dotnet21-dotnet Red Hat:rhel_dotnet:2.1::el7 | All versions | 0:2.1.500-5.el7 |
rh-dotnet21-dotnet-debuginfo Red Hat:rhel_dotnet:2.1::el7 | All versions | 0:2.1.500-5.el7 |
rh-dotnet21-dotnet-host Red Hat:rhel_dotnet:2.1::el7 | All versions | 0:2.1.6-5.el7 |
rh-dotnet21-dotnet-runtime-2.1 Red Hat:rhel_dotnet:2.1::el7 | All versions | 0:2.1.6-5.el7 |
rh-dotnet21-dotnet-sdk-2.1 Red Hat:rhel_dotnet:2.1::el7 | All versions | 0:2.1.500-5.el7 |
rh-dotnet21-dotnet-sdk-2.1.5xx Red Hat:rhel_dotnet:2.1::el7 | All versions | 0:2.1.500-5.el7 |
Products include Microsoft Asp.net Core.
How do I fix CVE-2018-8416?
Upgrade Microsoft.NETCore.App to 2.1.7 or later.
Is CVE-2018-8416 being exploited?
There is no known exploitation of CVE-2018-8416 in the wild and no public exploit code.
Other vulnerabilities in Microsoft .NET Core
- CVE-2025-55315 ASP.NET Security Feature Bypass Vulnerability
- CVE-2026-88092 ASP.NET Core Tampering Vulnerability
- CVE-2026-40372 ASP.NET Core Elevation of Privilege Vulnerability
- CVE-2021-43877 ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability
- CVE-2020-0603 Remote code execution in ASP.NET Core
Sources
Also known as GHSA-5633-f33j-c6f7, RHSA-2018:3676, UBUNTU-CVE-2018-8416.