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CVE-2026-70159

7.5 high SSVC exploitation: none Published
NVD · CVE.org

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Fix

Microsoft's update · Important

  • Release Notes — Microsoft.AspNetCore.SignalR.Common on .NET 10.0 runtime installed on Windows, Microsoft.AspNetCore.SignalR.Common on .NET 10.0 runtime installed on Linux, Microsoft.AspNetCore.SignalR.Common on .NET 10.0 runtime installed on Mac OS · build 10.0.13
  • Release Notes — Microsoft.AspNetCore.SignalR.Core on .NET 10.0 runtime installed on Windows, Microsoft.AspNetCore.SignalR.Core on .NET 10.0 runtime installed on Linux, Microsoft.AspNetCore.SignalR.Core on .NET 10.0 runtime installed on Mac OS, Microsoft.AspNetCore.SignalR.Core on .NET 11.0 runtime installed on Windows, Microsoft.AspNetCore.SignalR.Core on .NET 11.0 runtime installed on Linux, Microsoft.AspNetCore.SignalR.Core on .NET 11.0 runtime installed on Mac OS, Microsoft.AspNetCore.SignalR.Core on .NET 8.0 runtime installed on Windows, Microsoft.AspNetCore.SignalR.Core on .NET 8.0 runtime installed on Linux, Microsoft.AspNetCore.SignalR.Core on .NET 8.0 runtime installed on Mac OS, Microsoft.AspNetCore.SignalR.Core on .NET 9.0 runtime installed on Windows, Microsoft.AspNetCore.SignalR.Core on .NET 9.0 runtime installed on Linux, Microsoft.AspNetCore.SignalR.Core on .NET 9.0 runtime installed on Mac OS · build 1.2.14
  • Release Notes — Microsoft.AspNetCore.SignalR.Common on .NET 11.0 runtime installed on Windows, Microsoft.AspNetCore.SignalR.Common on .NET 11.0 runtime installed on Linux, Microsoft.AspNetCore.SignalR.Common on .NET 11.0 runtime installed on Mac OS · build 11.0.0-rc.2
  • Release Notes — Microsoft.AspNetCore.SignalR.Common on .NET 8.0 runtime installed on Windows, Microsoft.AspNetCore.SignalR.Common on .NET 8.0 runtime installed on Linux, Microsoft.AspNetCore.SignalR.Common on .NET 8.0 runtime installed on Mac OS · build 8.0.32
  • Release Notes — Microsoft.AspNetCore.SignalR.Common on .NET 9.0 runtime installed on Windows, Microsoft.AspNetCore.SignalR.Common on .NET 9.0 runtime installed on Linux, Microsoft.AspNetCore.SignalR.Common on .NET 9.0 runtime installed on Mac OS · build 9.0.21
  • Release Notes — Microsoft Visual Studio 2026 version 18.10 · build 18.10.4 · restart required
  • Release Notes — Microsoft Visual Studio 2022 version 17.14 · build 17.14.42 · restart required

From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-29 · Exploitation Less Likely.

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 4

  1. StatusUndergoing Analysis → PublishedNVD modified 2026-10-22 21:50
  2. StatusPublished → Undergoing AnalysisNVD modified 2026-10-22 22:18
  3. StatusAwaiting Analysis → PublishedNVD modified 2026-10-19 19:35
  4. First seenCVSS 7.5NVD modified 2026-10-13 23:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 1