microsoft.aspnetcore.server.kestrel.transport.libuv

Open advisories

2 actionable advisories, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

1. High, CVSS 7.5Exploited · CISA KEVNuGetPublished 9 Aug 2023

   .NET Denial of Service Vulnerability

   CVE-2023-38180 · GHSA-vmch-3w2x-vhgq

   Affected

   • NuGet microsoft.aspnetcore.server.kestrel.transport.libuv >= 6.0.0, <= 6.0.20; <= 2.1.39

   Fixed in

   6.0.212.1.40· Vendor fix available

   Issue

   Microsoft Security Advisory CVE-2023-38180: .NET Denial of Service Vulnerability <a name="executive-summary"</aExecutive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core 2.1, .NET 6.0, and .NET 7.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A vulnerability exists in Kestrel where, on detecting a potentially malicious client, Kestrel will sometimes fail to disconnect it, resulting in denial of service. Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/269 <a name="mitigation-factors"</aMitigation factors If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF <a name="affected-software"</aAffected software Any .NET 7.0 application running on .NET 7.0.8 or…

   Recommended action: Upgrade to 6.0.21 or 2.1.40 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

   Sources:github.com (1)cisa.gov (2)Source checked 26 Oct 2026, 17:04 UTCEvidence →
2. UnratedNuGetPublished 16 Oct 2018

   Moderate severity vulnerability that affects Microsoft.AspNetCore.All, Microsoft.AspNetCore.Server.Kestrel.Core, Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions, and…

   GHSA-3m2r-q8x3-xmf7

   Affected

   • NuGet microsoft.aspnetcore.server.kestrel.transport.libuv >= 2.0.0, < 2.0.3

   Fixed in

   2.0.3· Vendor fix available

   Issue

   Microsoft made an internal discovery of a security vulnerability in version 2.x of ASP.NET Core where a specially crafted request can cause excess resource consumption in Kestrel.

   Recommended action: Upgrade to 2.0.3 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

   Sources:github.comSource checked 26 Oct 2026, 16:58 UTCEvidence →