## Critical RCE Vulnerability in React Server Components Exposes Next.js, Vercel Issues Automated Patch
A critical remote code execution (RCE) vulnerability has been identified within React Server Components, directly impacting major web frameworks like Next.js. The flaw, stemming from insecure deserialization in the React Flight protocol, enables unauthenticated attackers to execute arbitrary code on the server. This represents a severe security breach vector for any application utilizing the affected technology stack.

The vulnerability is formally tracked under CVE-2025-55182 (React) and CVE-2025-66478 (Next.js), with a corresponding GitHub Security Advisory (GHSA-9qr9-h5gf-34mp). It was discovered in a project hosted on Vercel's platform. In response, Vercel has initiated automated patching efforts, generating pull requests for affected projects. However, the company explicitly warns that these automated fixes may not be comprehensive and could contain errors, urging developers to conduct thorough reviews before merging changes.

The discovery places immediate pressure on development teams using React Server Components, particularly within the Next.js ecosystem, to audit and secure their deployments. The nature of the flaw—server-side RCE via a core protocol—signals a fundamental security risk in a widely adopted modern web architecture. While automated patches are being deployed, the advisory underscores that manual verification and additional security checks are critical to mitigate the ongoing risk of exploitation.
---
- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: cybersecurity, vulnerability, react, nextjs, vercel
- **Credibility**: unverified
- **Published**: 2026-03-25 11:27:15
- **ID**: 33192
- **URL**: https://whisperx.ai/en/intel/33192