---
id: CVE-2025-55183
title: >-
  An information leak vulnerability exists in specific configurations of React
  Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and
  19.2.1, including the following packages: react-server-dom-parcel,
  react-server-dom…
summary: >-
  An information leak vulnerability exists in specific configurations of React
  Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and
  19.2.1, including the following packages: react-server-dom-parcel,
  react-server-dom…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
vendor: vercel
product: next.js
affected:
  - 'next.js >= 15.0.0, < 15.0.7'
  - 'next.js >= 15.1.0, < 15.1.11'
  - 'next.js >= 15.2.0, < 15.2.8'
  - 'next.js >= 15.3.0, < 15.3.8'
  - 'next.js >= 15.4.0, < 15.4.10'
  - 'next.js >= 15.5.0, < 15.5.9'
  - 'next.js >= 16.0.0, < 16.0.10'
  - next.js = 15.6.0
  - next.js = 16.1.0
  - 'react >= 19.0.0, < 19.0.2'
  - 'react >= 19.1.0, < 19.1.3'
  - 'react >= 19.2.0, < 19.2.2'
patched:
  - next.js 16.0.10
  - react 19.2.2
published: '2025-12-11'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T20:10:01.970'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-55183'
references:
  - url: >-
      https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components
    label: cve-assign@fb.com
  - url: 'https://www.facebook.com/security/advisories/cve-2025-55183'
    label: cve-assign@fb.com
tags:
  - nvd
  - exploit-available
epss: 0.64233
epssPercentile: 0.99212
exploits:
  github: 6
  githubRepos:
    - 'https://github.com/williavs/nextjs-security-update'
    - 'https://github.com/kimtruth/CVE-2025-55183-poc'
    - 'https://github.com/StealthMoud/react-server-cve-lab'
  checkedAt: '2026-10-07T20:47:22.824Z'
exploitAvailable: true
ingestedAt: '2026-10-07T20:46:46.863Z'
---

## Overview

An information leak vulnerability exists in specific configurations of React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. A specifically crafted HTTP request sent to a vulnerable Server Function may unsafely return the source code of any Server Function. Exploitation requires the existence of a Server Function which explicitly or implicitly exposes a stringified argument.

## Affected

- `next.js >= 15.0.0, < 15.0.7`
- `next.js >= 15.1.0, < 15.1.11`
- `next.js >= 15.2.0, < 15.2.8`
- `next.js >= 15.3.0, < 15.3.8`
- `next.js >= 15.4.0, < 15.4.10`
- `next.js >= 15.5.0, < 15.5.9`
- `next.js >= 16.0.0, < 16.0.10`
- `next.js = 15.6.0`
- `next.js = 16.1.0`
- `react >= 19.0.0, < 19.0.2`
- `react >= 19.1.0, < 19.1.3`
- `react >= 19.2.0, < 19.2.2`

## Remediation

Upgrade past the affected range:

- `next.js 16.0.10`
- `react 19.2.2`