## Critical RCE Vulnerability in React Server Components Exposes Next.js, Vercel Projects
A critical remote code execution (RCE) vulnerability has been identified in React Server Components, directly impacting major frameworks like Next.js and projects hosted on Vercel. The flaw, stemming from insecure deserialization within 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 React Server Components architecture.

The vulnerability is formally tracked under multiple advisories: GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React's CVE-2025-55182, and Next.js's CVE-2025-66478. It was discovered in the project 'chamanoeditsite' on Vercel, highlighting its immediate real-world applicability. In response, Vercel has begun generating automated pull requests for patching efforts, though the company explicitly warns that these automated fixes may not be comprehensive and could contain mistakes, urging developers to conduct additional reviews.

The widespread use of React Server Components within the Next.js ecosystem means this vulnerability poses a significant risk to a vast number of web applications. The requirement for manual review of automated patches introduces operational pressure on development teams to urgently assess and secure their deployments. This incident places scrutiny on the security of the serialization protocols underpinning modern React architectures and signals a critical need for framework-wide security audits.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: cybersecurity, vulnerability, react, nextjs, vercel
- **Credibility**: unverified
- **Published**: 2026-03-30 04:27:06
- **ID**: 40446
- **URL**: https://whisperx.ai/en/intel/40446