high

CVE-2026-42899

NuGet · Microsoft.AspNetCore.App.Runtime.win-arm • NuGet · Microsoft.AspNetCore.App.Runtime.win-arm64 • NuGet · Microsoft.AspNetCore.App.Runtime.win-x64 • NuGet · Microsoft.AspNetCore.App.Runtime.win-x86 • NuGet · Microsoft.AspNetCore.App.Runtime.linux-arm • NuGet · Microsoft.AspNetCore.App.Runtime.linux-arm64 • NuGet · Microsoft.AspNetCore.App.Runtime.linux-musl-arm • NuGet · Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 • NuGet · Microsoft.AspNetCore.App.Runtime.linux-musl-x64 • NuGet · Microsoft.AspNetCore.App.Runtime.linux-x64 • NuGet · Microsoft.AspNetCore.App.Runtime.osx-arm64 • NuGet · Microsoft.AspNetCore.App.Runtime.osx-x64

Summary

Microsoft Security Advisory CVE-2026-42899 – ASP.NET Core Denial of Service Vulnerability

Severity
high
EPSS
1.2% (p64)
Also known as
GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.linux-arm, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.linux-arm64, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.linux-musl-arm, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.linux-musl-arm64, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.linux-musl-x64, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.linux-x64, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.osx-arm64, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.osx-x64, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.win-arm, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.win-arm64, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.win-x64, GHSA-9v76-4qcc-frgh#Microsoft.AspNetCore.App.Runtime.win-x86, BIT-dotnet-2026-42899, BIT-dotnet-sdk-2026-42899
Published
2026-05-18

References

Related advisories

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.