## Critical RCE Vulnerability in React Server Components Exposes Next.js and Other Frameworks
A critical remote code execution (RCE) vulnerability has been identified in React Server Components, directly impacting major frameworks like Next.js. The flaw, which enables unauthenticated RCE on the server, stems from insecure deserialization within the React Flight protocol. This vulnerability was discovered in the project 'astacita-pendidikan' and represents a severe threat to any application using the affected technology stack.

The issue is formally tracked under multiple advisories, including GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React's CVE-2025-55182, and Next.js's CVE-2025-66478. The vulnerability allows attackers to execute arbitrary code on the server without authentication, posing a significant risk to data integrity and system security. Vercel has generated an automated pull request to assist with patching, though they explicitly warn that it may not be comprehensive and could contain mistakes, urging developers to review their guidance before merging changes.

This vulnerability places immense pressure on development teams using React Server Components to immediately review and patch their applications. The widespread adoption of Next.js means the potential attack surface is large, raising the risk of exploitation across numerous web applications. While automated fixes are being provided, the advisory underscores the necessity for manual review and additional security checks to ensure comprehensive mitigation against this critical server-side threat.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: cybersecurity, vulnerability, react, nextjs, vercel
- **Credibility**: unverified
- **Published**: 2026-03-31 07:27:15
- **ID**: 42638
- **URL**: https://whisperx.ai/en/intel/42638