CVE-2026-96230 ASP.NET Core Remote Code Execution Vulnerability
An attacker can execute code over the network via cross-site scripting in ASP.NET Core, requiring immediate patching for developers and administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-96230?
CVE-2026-96230 is a high-severity cross-site scripting vulnerability in Microsoft Visual Studio 2022 version 17.14, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper neutralization of input during web page generation ('cross-site scripting') in ASP.NET Core allows an unauthorized attacker to execute code over a network.
Weakness: CWE-79
Which versions are affected by CVE-2026-96230?
8 open source packages ship an affected version, including Microsoft.AspNetCore.Components.WebAssembly.Server.
| Package | Affected | Fixed in |
|---|---|---|
Microsoft.AspNetCore.Components.WebAssembly.Server NuGet | From 10.0.0 | 10.0.13 |
Microsoft.AspNetCore.Components.WebAssembly.Server NuGet | From 10.0.0 | 10.0.13 |
Microsoft.AspNetCore.Components.WebAssembly.Server NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.AspNetCore.Components.WebAssembly.Server NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.AspNetCore.Components.WebAssembly.Server NuGet | From 8.0.0 | 8.0.32 |
Microsoft.AspNetCore.Components.WebAssembly.Server NuGet | From 8.0.0 | 8.0.32 |
2 more packages
Microsoft.AspNetCore.Components.WebAssembly.Server NuGet | From 9.0.0 | 9.0.21 |
Microsoft.AspNetCore.Components.WebAssembly.Server NuGet | From 9.0.0 | 9.0.21 |
How do I fix CVE-2026-96230?
Upgrade Microsoft.AspNetCore.Components.WebAssembly.Server to a fixed version for your release line: 10.0.13, 11.0.0-rc.2, 8.0.32 or 9.0.21.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-96230 being exploited?
There is no known exploitation of CVE-2026-96230 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-qjpx-jqm5-h2c4, UBUNTU-CVE-2026-96230.