CVE-2026-70159ImportantDoSNetwork

ASP.NET Core Denial of Service Vulnerability

MSRC advisory NVD CVE.org

Assessment

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

Severity: Important
CVSS base score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Impact: Denial of Service
EPSS, next 30 days: Not scored yet
Public exploit code: No Nuclei template lists it
Exploitability: Exploitation Less Likely
Publicly disclosed: No
Customer action: Required: apply the update
Component: ASP.NET Core
Weakness: CWE-770: Allocation of Resources Without Limits or Throttling
Issued by: Microsoft
Published: 13 Oct 2026 · October 2026
Last revised: 13 Oct 2026

CVSS 3.1 base metricsRed raises the risk · green lowers it

Attack vector: NetworkAV:N
Attack complexity: LowAC:L
Privileges required: NonePR:N
User interaction: NoneUI:N
Scope: UnchangedS:U
Confidentiality: NoneC:N
Integrity: NoneI:N
Availability: HighA:H

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Developer Tools, Other

26 affected products

Microsoft Visual Studio 2022 version 17.14
Microsoft Visual Studio 2026 version 18.10
Microsoft.AspNetCore.SignalR.Common on .NET 10.0 installed on Linux
Microsoft.AspNetCore.SignalR.Common on .NET 10.0 installed on Mac OS
Microsoft.AspNetCore.SignalR.Common on .NET 10.0 installed on Windows
Microsoft.AspNetCore.SignalR.Common on .NET 11.0 installed on Linux
Microsoft.AspNetCore.SignalR.Common on .NET 11.0 installed on Mac OS
Microsoft.AspNetCore.SignalR.Common on .NET 11.0 installed on Windows
Microsoft.AspNetCore.SignalR.Common on .NET 8.0 installed on Linux
Microsoft.AspNetCore.SignalR.Common on .NET 8.0 installed on Mac OS
Microsoft.AspNetCore.SignalR.Common on .NET 8.0 installed on Windows
Microsoft.AspNetCore.SignalR.Common on .NET 9.0 installed on Linux
Microsoft.AspNetCore.SignalR.Common on .NET 9.0 installed on Mac OS
Microsoft.AspNetCore.SignalR.Common on .NET 9.0 installed on Windows
Microsoft.AspNetCore.SignalR.Core on .NET 10.0 installed on Linux
Microsoft.AspNetCore.SignalR.Core on .NET 10.0 installed on Mac OS
Microsoft.AspNetCore.SignalR.Core on .NET 10.0 installed on Windows
Microsoft.AspNetCore.SignalR.Core on .NET 11.0 installed on Linux
Microsoft.AspNetCore.SignalR.Core on .NET 11.0 installed on Mac OS
Microsoft.AspNetCore.SignalR.Core on .NET 11.0 installed on Windows
Microsoft.AspNetCore.SignalR.Core on .NET 8.0 installed on Linux
Microsoft.AspNetCore.SignalR.Core on .NET 8.0 installed on Mac OS
Microsoft.AspNetCore.SignalR.Core on .NET 8.0 installed on Windows
Microsoft.AspNetCore.SignalR.Core on .NET 9.0 installed on Linux
Microsoft.AspNetCore.SignalR.Core on .NET 9.0 installed on Mac OS
Microsoft.AspNetCore.SignalR.Core on .NET 9.0 installed on Windows

What changed

First observed 14 Oct 2026

No field changes in the recorded history.

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