## Critical RCE Vulnerability in React Server Components Exposes Next.js Deployments to Unauthenticated Server-Side Attacks
A critical remote code execution vulnerability has been identified in React Server Components, raising serious security concerns across deployments using Next.js and related frameworks. The flaw enables unauthenticated RCE on the server through insecure deserialization within the React Flight protocol, according to security advisories tracking the issue.

The vulnerability is tracked under multiple identifiers: GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React advisory CVE-2025-55182, and Next.js advisory CVE-2025-66478. The project di-portfolio on Vercel has been identified as affected by this flaw. An automated pull request has been generated by Vercel to assist with patching, though officials caution the automated fix may not be comprehensive and could contain errors. Users are advised to review the provided guidance before merging any changes.

The exposure highlights a systemic risk within the JavaScript ecosystem, given the widespread adoption of React Server Components and Next.js in production environments. Developers and organizations running affected frameworks face immediate pressure to audit their deployments, apply available patches, and verify that server-side deserialization paths are properly secured. The severity of unauthenticated RCE means this vulnerability could allow attackers to compromise servers without any credentials or user interaction, making prompt remediation a critical priority.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: RCE vulnerability, React Server Components, Next.js, CVE-2025-55182, CVE-2025-66478
- **Credibility**: unverified
- **Published**: 2026-04-24 21:54:11
- **ID**: 76971
- **URL**: https://whisperx.ai/en/intel/76971