Summary
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.127 and .NET Runtime 8.0.27.Security Fix(es):
* serialize-javascript: serialize-javascript: Denial of Service via specially crafted array-like object serialization (CVE-2026-34043)
* dotnet: .NET: infinite loop allows an attacker to cause a denial of service (CVE-2026-42899)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 12
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 9 | aspnetcore-runtime-8.0 | 8.0.27-1.el9_8 |
| AlmaLinux · 9 | aspnetcore-runtime-dbg-8.0 | 8.0.27-1.el9_8 |
| AlmaLinux · 9 | aspnetcore-targeting-pack-8.0 | 8.0.27-1.el9_8 |
| AlmaLinux · 9 | dotnet-apphost-pack-8.0 | 8.0.27-1.el9_8 |
| AlmaLinux · 9 | dotnet-hostfxr-8.0 | 8.0.27-1.el9_8 |
| AlmaLinux · 9 | dotnet-runtime-8.0 | 8.0.27-1.el9_8 |
| AlmaLinux · 9 | dotnet-runtime-dbg-8.0 | 8.0.27-1.el9_8 |
| AlmaLinux · 9 | dotnet-sdk-8.0 | 8.0.127-1.el9_8 |
| AlmaLinux · 9 | dotnet-sdk-8.0-source-built-artifacts | 8.0.127-1.el9_8 |
| AlmaLinux · 9 | dotnet-sdk-dbg-8.0 | 8.0.127-1.el9_8 |
| AlmaLinux · 9 | dotnet-targeting-pack-8.0 | 8.0.27-1.el9_8 |
| AlmaLinux · 9 | dotnet-templates-8.0 | 8.0.127-1.el9_8 |
Vulnerabilities 2
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High 7.5
ASP.NET Core Denial of Service Vulnerability
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
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Medium 5.9
Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects
Serialize JavaScript to a superset of JSON that includes regular expressions and functions. Prior to version 7.0.5, there is a Denial of Service (DoS) vulnerability caused by CPU exhaustion. When serializing a specially crafted "array-like" object (an object …