CVE-2026-42899

HIGH

Microsoft ASP.NET Core - Infinite Loop Denial of Service

Title source: manual
STIX 2.1

Description

Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.

References (21)

Core 21
Core References
Vendor Advisory vendor-advisory patch
ASP.NET Core Denial of Service Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899

Scores

CVSS v3 7.5
EPSS 0.0243
EPSS Percentile 82.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-835
Status published
Products (40)
microsoft/.net 8.0.0 - 8.0.27
Microsoft/.NET 10.0 10.0.0 - 10.0.8
Microsoft/.NET 8.0 8.0.0 - 8.0.27
Microsoft/.NET 9.0 9.0.0 - 9.0.16
nuget/Microsoft.AspNetCore.App.Runtime.linux-arm 10.0.0 - 10.0.8NuGet
nuget/Microsoft.AspNetCore.App.Runtime.linux-arm 8.0.0 - 8.0.27NuGet
nuget/Microsoft.AspNetCore.App.Runtime.linux-arm 9.0.0 - 9.0.16NuGet
nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64 10.0.0 - 10.0.8NuGet
nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64 8.0.0 - 8.0.27NuGet
nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64 9.0.0 - 9.0.16NuGet
... and 30 more
Published May 12, 2026
Tracked Since May 12, 2026