## Critical RCE Vulnerability in React Server Components Exposes Next.js Applications to Server-Side Attacks
A critical remote code execution vulnerability in React Server Components has been identified, raising significant security concerns for applications built on frameworks including Next.js. The flaw enables unauthenticated attackers to execute arbitrary code on servers by exploiting insecure deserialization within the React Flight protocol.

The vulnerability is tracked under multiple security advisories: GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React advisory CVE-2025-55182, and Next.js advisory CVE-2025-66478. Vercel has automatically generated pull requests to assist affected projects with patching efforts, though the company warns that the automated fixes may not be comprehensive and could contain errors.

The issue was discovered in project dawood-khan hosted on Vercel's platform. Organizations using React Server Components are being advised to carefully review Vercel's guidance before applying any patches. Security researchers warn that successful exploitation could allow threat actors to compromise entire server environments without requiring authentication credentials.

The disclosure comes amid growing scrutiny of supply chain vulnerabilities in JavaScript frameworks. React Server Components, which allow components to render on the server while streaming content to clients, have seen widespread adoption in modern web development. The severity of the flaw has prompted calls for immediate patching across affected deployments, with security teams urged to assess their exposure and implement compensating controls where immediate updates are not feasible.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: RCE, CVE-2025-55182, React, Next.js, deserialization
- **Credibility**: unverified
- **Published**: 2026-05-03 17:54:06
- **ID**: 79137
- **URL**: https://whisperx.ai/en/intel/79137