---
id: CVE-2026-23864
title: >-
  Multiple denial of service vulnerabilities exist in React Server Components,
  affecting the following packages: react-server-dom-parcel,
  react-server-dom-turbopack, react-server-dom-webpack.


  The vulnerabilities are triggered by sending s…
summary: >-
  Multiple denial of service vulnerabilities exist in React Server Components,
  affecting the following packages: react-server-dom-parcel,
  react-server-dom-turbopack, react-server-dom-webpack.


  The vulnerabilities are triggered by sending s…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-502
  - CWE-1284
vendor: facebook
product: react
affected:
  - 'react >= 19.0.0, < 19.0.4'
  - 'react >= 19.1.0, < 19.1.5'
  - 'react >= 19.2.0, < 19.2.4'
patched:
  - react 19.2.4
published: '2026-01-26'
updated: '2026-06-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-23864'
references:
  - url: 'https://www.facebook.com/security/advisories/cve-2026-23864'
    label: cve-assign@fb.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:13571'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2026-23864'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2433059'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23864.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
epss: 0.02581
epssPercentile: 0.84556
ingestedAt: '2026-06-30T17:40:12.460Z'
---

## Overview

Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack.

The vulnerabilities are triggered by sending specially crafted HTTP requests to Server Function endpoints, and could lead to server crashes, out-of-memory exceptions or excessive CPU usage; depending on the vulnerable code path being exercised, the application configuration and application code.

Strongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components.

## Affected

- `react >= 19.0.0, < 19.0.4`
- `react >= 19.1.0, < 19.1.5`
- `react >= 19.2.0, < 19.2.4`

## Remediation

Upgrade past the affected range:

- `react 19.2.4`