## Critical Remote Code Execution Flaw in React Server Components Targets Next.js and Allied Frameworks
A critical remote code execution vulnerability in React Server Components has been identified, enabling unauthenticated attackers to execute arbitrary code on the server through insecure deserialization in the React Flight protocol. The flaw affects applications built with Next.js and similar frameworks that rely on React Server Components architecture.

The security weakness was discovered in the "sun-eater" project hosted on Vercel's platform and has been assigned multiple tracking identifiers across major ecosystems: GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React advisory CVE-2025-55182, and Next.js advisory CVE-2025-66478. The vulnerability specifically stems from insecure handling of the React Flight serialization mechanism, allowing malicious payloads to be deserialized server-side without authentication requirements.

In response, Vercel has automatically generated a pull request to assist affected developers with patching efforts. However, the company cautions that this automated fix may not be comprehensive and could contain errors. Developers are strongly advised to carefully review the proposed changes and consult Vercel's additional guidance before merging. The overlapping advisories across React and Next.js security channels indicate coordinated disclosure efforts, though the full scope of applications potentially impacted by this deserialization flaw remains under assessment. Organizations running vulnerable versions of Next.js with React Server Components enabled should prioritize applying patches or workarounds outlined in the linked security advisories.
---
- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: RCE, CVE-2025-55182, CVE-2025-66478, Next.js, React Flight
- **Credibility**: unverified
- **Published**: 2026-05-15 04:18:26
- **ID**: 83297
- **URL**: https://whisperx.ai/en/intel/83297