CVE-2026-102870

ASP.NET Core Remote Code Execution Vulnerability

State: Published
Severity: 8.8 High
Published: Oct 13, 2026
Updated: Oct 31, 2026
Reserved: Sep 29, 2026

Description

Improper control of generation of code ('code injection') in ASP.NET Core allows an unauthorized attacker to execute code over a network.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

Product	Versions
.NET 10.0 installed on LinuxMicrosoft	10.0.0 to before 10.0.403Affected
.NET 10.0 installed on Mac OSMicrosoft	10.0.0 to before 10.0.403Affected
.NET 10.0 installed on WindowsMicrosoft	10.0.0 to before 10.0.403Affected
.NET 11.0 installed on LinuxMicrosoft	11.0.0-preview.1 to before 11.0.100-rc.3Affected
.NET 11.0 installed on Mac OSMicrosoft	11.0.0-preview.1 to before 11.0.100-rc.3Affected
.NET 11.0 installed on WindowsMicrosoft	11.0.0-preview.1 to before 11.0.100-rc.3Affected
Microsoft Visual Studio 2019 version 16.11Microsoft	16.11.0 to before 16.11.61Affected
Microsoft Visual Studio 2022 version 17.14Microsoft	17.14.0 to before 17.14.43Affected
Microsoft Visual Studio 2026 version 18.10Microsoft	18.10.0 to before 18.10.4Affected
Microsoft Visual Studio 2026 version 18.11Microsoft	18.11.0 to before 18.11.2Affected
Microsoft Visual Studio 2026 version 18.12Microsoft	18.12.0 to before 18.12 Insiders 3Affected
Microsoft.AspNetCore.Components.WebAssembly.DevServerMicrosoft	11.0.0-preview.1 to before 10.0.14Affected
Microsoft.AspNetCore.Components.WebAssembly.ServerMicrosoft	10.0.0 to before 10.0.13Affected

References

ASP.NET Core Remote Code Execution Vulnerabilityvendor-advisorypatch

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