CVE-2026-96230

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

ProductMicrosoft.aspnetcore.components.webassembly.server

PublishedOct 13, 2026

First seenOct 13, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

Microsoft.AspNetCore.Components.WebAssembly.Server10.0.13, 11.0.0-rc.2, 8.0.32, 9.0.21 or later

Patches

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96230

Affected products

Product	Affected versions	Fixed in
Microsoft.AspNetCore.Components.WebAssembly.ServerNuGet	10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 9.0.0 ≤ v < 9.0.21	10.0.13, 11.0.0-rc.2, 8.0.32, 9.0.21

Check your version

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