## 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, stemming from insecure deserialization in the React Flight protocol, enables unauthenticated attackers to execute arbitrary code on affected servers. This is not a theoretical risk; the vulnerability was discovered in a live project, cdk-copilot-api, demonstrating a clear path to exploitation.

The security issue is being tracked under multiple official advisories, including GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React's CVE-2025-55182, and Next.js's CVE-2025-66478. Vercel has initiated automated patching efforts, generating pull requests for affected projects. However, the company explicitly warns that these automated fixes may not be comprehensive and could contain mistakes, urging developers to conduct thorough reviews before merging any changes.

The discovery places immediate pressure on development teams using React Server Components, particularly within the Next.js ecosystem. The requirement for manual verification of automated patches creates a critical window where systems remain exposed. This vulnerability underscores the persistent security risks in modern, data-serialization-heavy web architectures and signals a period of intense scrutiny and mandatory updates for countless production applications.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: React, Next.js, Security, Vulnerability, RCE
- **Credibility**: unverified
- **Published**: 2026-03-25 12:27:27
- **ID**: 33282
- **URL**: https://whisperx.ai/en/intel/33282