## Critical RCE Vulnerability in React Server Components Exposes Next.js and Other Frameworks
A critical remote code execution (RCE) vulnerability has been identified within React Server Components, posing a direct threat to major frameworks like Next.js. The flaw, stemming from insecure deserialization in the React Flight protocol, enables unauthenticated attackers to execute arbitrary code on the server. This is not a theoretical risk; the vulnerability was actively identified in a live project, underscoring its immediate exploit potential.

The issue is formally tracked under multiple high-severity advisories: GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React's CVE-2025-55182, and Next.js's CVE-2025-66478. The vulnerability's mechanism allows malicious payloads to be deserialized and executed on the server side, bypassing authentication controls. Vercel has initiated automated patching efforts, generating pull requests for affected projects, but explicitly warns that these automated fixes may not be comprehensive and could contain errors, requiring manual review.

The discovery places immense pressure on development teams using React Server Components, particularly within the Next.js ecosystem, to urgently review and apply security patches. The public advisories and coordinated disclosure signal a widespread, high-priority security event. Organizations must treat this as a critical infrastructure update, as failure to patch could leave web applications exposed to server takeover. The incident highlights persistent security challenges in modern, data-serialization-heavy web frameworks and the cascading risks when a core library like React contains a critical flaw.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: cybersecurity, vulnerability, react, nextjs, vercel
- **Credibility**: unverified
- **Published**: 2026-03-29 04:27:03
- **ID**: 39582
- **URL**: https://whisperx.ai/en/intel/39582