---
title: "Microsoft.AspNetCore.Components.WebAssembly.Server — CVE-2026-102870"
description: "A remote code execution flaw affects the NuGet package Microsoft.AspNetCore.Components.WebAssembly.Server. Affected versions: >= 10.0.0, <= 10.0.12. Fixed from version 10.0.13. CVSS score 8.8."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-10-13-cve-2026-102870
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-10-13
dateModified: 2026-10-13
---
# Microsoft.AspNetCore.Components.WebAssembly.Server — CVE-2026-102870

A remote code execution flaw affects the NuGet package Microsoft.AspNetCore.Components.WebAssembly.Server. Affected versions: >= 10.0.0, <= 10.0.12. Fixed from version 10.0.13. CVSS score 8.8.

## What to do

Update Microsoft.AspNetCore.Components.WebAssembly.Server to 10.0.13 or later.

| Fact | Value |
| --- | --- |
| Package | Microsoft.AspNetCore.Components.WebAssembly.Server |
| Ecosystem | NuGet (.NET) |
| Class | Remote code execution |
| Affected versions | >= 10.0.0, <= 10.0.12 |
| Fixed version | 10.0.13 |
| CVSS | 8.8 |
| CVE | CVE-2026-102870 |
| GHSA | GHSA-g27p-qf6j-c96c |
| Published on | October 13, 2026 |
| Severity | High |

## Sources

- [GitHub Security Advisory — GHSA-g27p-qf6j-c96c](https://github.com/advisories/GHSA-g27p-qf6j-c96c) — GitHub Security Advisories
- [NVD — CVE-2026-102870](https://nvd.nist.gov/vuln/detail/CVE-2026-102870) — NVD

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