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

The security issue is formally tracked under GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React's CVE-2025-55182, and Next.js's CVE-2025-66478. The vulnerability specifically impacts the `uml-tools` project and, by extension, any implementation using the vulnerable React Server Components protocol. In response, Vercel has generated an automated pull request to assist with patching, though it explicitly warns that the fix may not be comprehensive and requires manual review before deployment.

The discovery places urgent pressure on development teams using React Server Components, particularly within the Next.js ecosystem, to audit and update their dependencies. While automated tools provide a starting point, the complexity of the deserialization flaw means manual verification is critical to ensure complete remediation. This vulnerability highlights the persistent security challenges in modern web application architectures and the cascading risks when a core protocol like React Flight is compromised.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: React, Next.js, Security Vulnerability, Remote Code Execution, CVE
- **Credibility**: unverified
- **Published**: 2026-04-01 05:27:04
- **ID**: 44675
- **URL**: https://whisperx.ai/en/intel/44675