CVE Watch8 oct 2026

CVE-2025-55182

Meta React Server Components Remote Code Execution Vulnerability

CVSS

10.0

Crítico

EPSS

99.8%

p100

KEV

SÍ

5 dic 2025

Exploit Today

0-100

Publicado: 3 dic 2025 · Última mod.: 8 oct 2026 · CWE-502

EPSS · 30d

99.8%EPSS · 30 días99.8%

2026-09-162026-10-14

Ficha del catálogo KEV

Producto

Meta / React Server Components

Vulnerabilidad

Meta React Server Components Remote Code Execution Vulnerability

Añadido a KEV

5 dic 2025

Remediar antes de

12 dic 2025

Uso conocido en ransomware

Sí

Descripción resumida

Meta React Server Components contains a remote code execution vulnerability that could allow unauthenticated remote code execution by exploiting a flaw in how React decodes payloads sent to React Server Function endpoints. Please note CVE-2025-66478 has been rejected, but it is associated with CVE-2025- 55182.

Acción requerida

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notas

Check for signs of potential compromise on all internet accessible REACT instances after applying mitigations. For more information, please see: https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components ; https://github.com/vercel-labs/fix-react2shell-next?tab=readme-ov-file ; https://nvd.nist.gov/vuln/detail/CVE-2025-55182

Descripción técnica

A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.

Referencias oficiales

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