Code Injection Vulnerability in ASP.NET Core by Microsoft
CVE-2026-102870

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Visual Studio 2022 Version 17.14
Microsoft Visual Studio 2026 Version 18.10
Microsoft.aspnetcore.components.webassembly.server
Vendor
CVE Published:
13 October 2026

What is CVE-2026-102870?

A code injection vulnerability in ASP.NET Core allows unauthorized attackers to execute arbitrary code over a network. This weakens the security posture of applications built on this framework, potentially exposing sensitive data and compromising system integrity. Admins should promptly apply available patches to mitigate risks.

Affected Version(s)

Microsoft Visual Studio 2022 version 17.14 17.14.0 < 17.14.42

Microsoft Visual Studio 2026 version 18.10 18.10.0 < 18.10.4

Microsoft.AspNetCore.Components.WebAssembly.Server .NET 10.0 installed on Linux 10.0.0 < 10.0.13

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.