## Critical RCE Vulnerability in React Server Components Exposes Next.js and Other Frameworks
A critical remote code execution (RCE) vulnerability has been identified within React Server Components, posing a direct threat to major frameworks like Next.js. The flaw, rooted in insecure deserialization in the React Flight protocol, enables unauthenticated attackers to execute arbitrary code on the server. This is not a theoretical risk; the vulnerability was discovered in a live project, viva-mar, underscoring its immediate exploitability. The issue is formally tracked under GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React's CVE-2025-55182, and Next.js's CVE-2025-66478.

The vulnerability stems from a deserialization weakness that allows malicious payloads to be processed by the server. This impacts any application using React Server Components, a core architecture for modern React frameworks. While Vercel has generated an automated pull request to assist with patching, they explicitly warn that it may not be comprehensive and could contain errors, urging developers to conduct additional checks before merging.

The discovery triggers urgent patching efforts across the React ecosystem. Developers and organizations relying on Next.js and similar frameworks must immediately review their security advisories and apply the necessary updates. The public disclosure of specific CVEs and the live project example increases the risk of active exploitation, placing significant pressure on development teams to secure their deployments before attacks materialize.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: cybersecurity, react, nextjs, vulnerability, vercel
- **Credibility**: unverified
- **Published**: 2026-03-25 13:27:25
- **ID**: 33384
- **URL**: https://whisperx.ai/en/intel/33384