## 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 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 for any application built with the affected technology stack.

The vulnerability was discovered in the project 'moodflix' and is now formally tracked under multiple advisories: GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React's CVE-2025-55182, and Next.js's CVE-2025-66478. In response, Vercel has generated an automated pull request to assist with patching efforts. However, the company explicitly warns that this automated fix may not be comprehensive and could contain mistakes, urging developers to review their guidance before merging changes.

The discovery places immense pressure on development teams using React Server Components, particularly within the Next.js ecosystem, to immediately review and secure their applications. The public disclosure of the CVEs signals that the vulnerability is now widely known, increasing the risk of exploitation. While the automated patch provides a starting point, the onus remains on individual organizations to conduct thorough security reviews, as the underlying deserialization flaw could allow for complete server compromise if left unaddressed.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: React, Next.js, Security, Vulnerability, RCE
- **Credibility**: unverified
- **Published**: 2026-04-03 07:27:05
- **ID**: 48621
- **URL**: https://whisperx.ai/en/intel/48621