## Critical RCE Vulnerability in React Server Components Triggers Vercel Auto-Patch Across Next.js Deployments
A critical remote code execution vulnerability in React Server Components has prompted Vercel to automatically generate patch pull requests for affected projects. The flaw, stemming from insecure deserialization in the React Flight protocol, enables unauthenticated attackers to execute arbitrary code on servers running vulnerable configurations of Next.js and related frameworks.

The vulnerability was identified in the project ielts-writing-checker-hwbn, hosted on Vercel's platform. Security advisories tracking the flaw include GitHub Advisory GHSA-9qr9-h5gf-34mp, React advisory CVE-2025-55182, and Next.js advisory CVE-2025-66478. Vercel's automated systems detected the exposure and initiated patch generation, though the company cautions that the auto-generated PRs may not be comprehensive and could contain errors. Developers are urged to review Vercel's additional guidance before merging any automated fixes.

The discovery underscores a broader pattern of supply-chain exposure in JavaScript framework ecosystems, where deserialization vulnerabilities in core protocols can cascade across numerous downstream applications. Organizations running React Server Components in production environments face immediate pressure to audit their deployments, verify patch completeness, and assess whether exploitation attempts have occurred. The overlap between React, Next.js, and Vercel advisories suggests coordinated disclosure efforts, though full details of affected version ranges remain under active review.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: rce-vulnerability, react-server-components, next.js, vercel, cve
- **Credibility**: unverified
- **Published**: 2026-05-15 07:48:36
- **ID**: 83366
- **URL**: https://whisperx.ai/en/intel/83366