Cross-site Request Forgery (CSRF) Affecting microsoft.aspnetcore.app.runtime.linux-musl-x64 package, versions [11.0.0-preview.6.26359.118, 11.0.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DOTNET-MICROSOFTASPNETCOREAPPRUNTIMELINUXMUSLX64-22412587
- published11 Nov 2026
- disclosed9 Nov 2026
- creditDerek Haber,Anonymous,Artur Stetsko,s3zer0,Leonardo Souza,Attila.Cs
Introduced: 9 Nov 2026
NewCVE-2026-109481 (opens in a new tab)How to fix?
Upgrade Microsoft.AspNetCore.App.Runtime.linux-musl-x64 to version 11.0.0 or higher.
Overview
Microsoft.AspNetCore.App.Runtime.linux-musl-x64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments.
Affected versions of this package are vulnerable to Cross-site Request Forgery (CSRF) in its SignalR authentication refresh endpoint /_blazor/refresh, which accepts a cross-site "simple" request that requires no preflight. An attacker can bind a victim's authenticated principal to an attacker-owned circuit by causing the victim's browser to issue a cross-site request to that path. This affects .NET 11 release candidates and is fixed in 11.0.0, and requires a Blazor Server app using interactive server circuits.