CVE Watch18 de out. de 2026

CVE-2025-55182

Meta React Server Components Remote Code Execution Vulnerability

CVSS

10.0

Crítica

EPSS

99.7%

p100

KEV

SIM

5 de dez. de 2025

Exploit Today

0-100

Publicado: 3 de dez. de 2025 · Última mod.: 18 de out. de 2026 · CWE-502

EPSS · 30d

99.7%EPSS · 30 dias99.8%

2026-10-082026-11-05

Ficha do catálogo KEV

Produto

Meta / React Server Components

Vulnerabilidade

Meta React Server Components Remote Code Execution Vulnerability

Adicionado ao KEV

5 de dez. de 2025

Corrigir até

12 de dez. de 2025

Uso conhecido em ransomware

Sim

Descrição 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.

Ação necessária

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

Descrição 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.

Referências oficiais

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