---
id: "GHSA-xqc2-xf4c-x3h3"
page: "https://infrastack.ai/live/GHSA-xqc2-xf4c-x3h3"
kind: "vulnerability"
aliases: ["GHSA-xqc2-xf4c-x3h3"]
title: "Unauthenticated Remote Code Execution in React Server Components"
severity: "critical"
cvss: 9.5
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "react-server-dom-parcel", "fixed": ["19.0.9", "19.1.10", "19.2.9", "19.3.1"], "affected": ">= 19.0.0, < 19.0.9; >= 19.1.0, < 19.1.10; >= 19.2.0, < 19.2.9; >= 19.3.0, < 19.3.1", "ecosystem": "npm"}, {"name": "react-server-dom-turbopack", "fixed": ["19.0.9", "19.1.10", "19.2.9", "19.3.1"], "affected": ">= 19.0.0, < 19.0.9; >= 19.1.0, < 19.1.10; >= 19.2.0, < 19.2.9; >= 19.3.0, < 19.3.1", "ecosystem": "npm"}, {"name": "react-server-dom-webpack", "fixed": ["19.0.9", "19.1.10", "19.2.9", "19.3.1"], "affected": ">= 19.0.0, < 19.0.9; >= 19.1.0, < 19.1.10; >= 19.2.0, < 19.2.9; >= 19.3.0, < 19.3.1", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["next.js", "node", "package", "react", "react-server-components"]
not_affected_if: ["client-only-react", "no-framework", "no-server-components"]
published_at: "2026-10-14T17:08:26+00:00"
first_seen_at: "2026-11-09T22:53:13+00:00"
updated_at: "2026-11-09T22:54:05+00:00"
sources: [{"source": "ghsa-repo", "url": "https://github.com/react/react/security/advisories/GHSA-xqc2-xf4c-x3h3", "first_seen_at": "2026-11-09T22:53:13+00:00"}]
exploit_sources: []
---

# Unauthenticated Remote Code Execution in React Server Components

Link for people: https://infrastack.ai/live/GHSA-xqc2-xf4c-x3h3 (this .md is for agents)

Crafted payloads sent to frameworks that use React Server Components can make the server execute attacker-supplied code. The flaw is reachable only in rare cases where responses carry multiple typed arrays and an attacker-controlled value.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- npm:react-server-dom-parcel affected >= 19.0.0, < 19.0.9; >= 19.1.0, < 19.1.10; >= 19.2.0, < 19.2.9; >= 19.3.0, < 19.3.1 fixed 19.0.9, 19.1.10, 19.2.9, 19.3.1
- npm:react-server-dom-turbopack affected >= 19.0.0, < 19.0.9; >= 19.1.0, < 19.1.10; >= 19.2.0, < 19.2.9; >= 19.3.0, < 19.3.1 fixed 19.0.9, 19.1.10, 19.2.9, 19.3.1
- npm:react-server-dom-webpack affected >= 19.0.0, < 19.0.9; >= 19.1.0, < 19.1.10; >= 19.2.0, < 19.2.9; >= 19.3.0, < 19.3.1 fixed 19.0.9, 19.1.10, 19.2.9, 19.3.1

## How to check

- Check the installed version of `react-server-dom-webpack`, `react-server-dom-parcel` or `react-server-dom-turbopack` with `npm ls react-server-dom-webpack react-server-dom-parcel react-server-dom-turbopack`
- Look for these packages in your lockfile and in any framework that bundles them
- Affected versions are `19.0.0` through `19.0.8`, `19.1.0` through `19.1.9`, `19.2.0` through `19.2.8` and `19.3.0`

## Fix

- `react-server-dom-webpack`, `react-server-dom-parcel`, `react-server-dom-turbopack`: `19.0.9`, `19.1.10`, `19.2.9` or `19.3.1` (the fixed version on your release line)

## Timeline

- 2026-11-09T22:53:13+00:00 ghsa-repo https://github.com/react/react/security/advisories/GHSA-xqc2-xf4c-x3h3

## Documents

- [advisory] Maintainer's advisory: github.com https://github.com/react/react/security/advisories/GHSA-xqc2-xf4c-x3h3

## From the sources

### Impact

Crafted payloads targeting frameworks supporting React Server Components can lead to remote code execution. This only affects extremely rare cases where responses transport multiple typed arrays and an attacker-controlled value.

We recommend updating immediately.

The vulnerability exists in versions 19.0.0 through 19.0.8, 19.1.0 through 19.1.9, 19.2.0 through 19.2.8 and 19.3.0 of:

- react-server-dom-webpack
- react-server-dom-parcel
- react-server-dom-turbopack

### Patches

Fixes were back ported to versions 19.0.09, 19.1.10, 19.2.9, and 19.3.1.

If you are using any of the above packages please upgrade to any of the fixed versions immediately.

If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability.

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