## Critical RCE Vulnerability in React Server Components Exposes Next.js and Vercel Projects to Remote Attacks
A critical remote code execution vulnerability has been identified in React Server Components, the technology powering modern full-stack JavaScript frameworks including Next.js. The flaw, tracked under multiple security advisories including CVE-2025-55182 and CVE-2025-66478, stems from insecure deserialization within the React Flight protocol. The vulnerability enables unauthenticated remote code execution on affected servers, posing a severe risk to applications built on these widely deployed frameworks.

The exposure was discovered in a production project hosted on Vercel, specifically the recipe-app maintained by developer moyukh11s-projects-860484f5. In response, Vercel automatically generated a pull request to assist with patching efforts, though the company cautioned that the automated fix may not be comprehensive and could contain errors. The GitHub Security Advisory GHSA-9qr9-h5gf-34mp provides technical details on the vulnerability mechanism. Affected organizations are urged to carefully review Vercel's guidance before applying any patches, as the company cannot guarantee the automated changes fully resolve the issue.

The vulnerability raises significant concerns across the React ecosystem, given the widespread adoption of Server Components in production applications. React Server Components allow developers to render components on the server while streaming content to clients, a architecture choice that sits at the core of Next.js and other meta-frameworks. The insecure deserialization flaw in the Flight protocol suggests a systemic weakness in how server-to-client data transmission is validated. Security researchers continue to analyze the attack surface, and organizations using affected frameworks should monitor official advisories for updated remediation guidance.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: react, nextjs, vercel, rce, cve
- **Credibility**: unverified
- **Published**: 2026-04-28 09:54:08
- **ID**: 77754
- **URL**: https://whisperx.ai/en/intel/77754