## 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, posing a direct threat to server security for major frameworks like Next.js. The flaw, rooted in insecure deserialization within the React Flight protocol, enables unauthenticated attackers to execute arbitrary code on affected servers. This is not a theoretical risk; it is a documented, high-severity security breach that demands immediate patching.

The vulnerability 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 issue was publicly disclosed in a project blog post, confirming its existence and the technical vector. While Vercel has generated an automated pull request to assist with patching, the company explicitly warns that the fix may not be comprehensive and could contain mistakes, urging developers to conduct additional reviews.

The exposure primarily impacts the ecosystem built around React Server Components, a core modern web architecture. The presence of this RCE flaw places countless production applications at risk of compromise until patches are fully applied and verified. This incident triggers urgent scrutiny for development teams relying on these frameworks, highlighting the persistent security challenges in complex serialization protocols and the critical need for rigorous dependency management.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: cybersecurity, vulnerability, react, nextjs, vercel
- **Credibility**: unverified
- **Published**: 2026-03-31 04:27:00
- **ID**: 42390
- **URL**: https://whisperx.ai/en/intel/42390