## Critical React Server Components RCE Vulnerability Discovered; Next.js, Vercel Frameworks Affected by CVE-2025-55182
Security researchers have identified a critical remote code execution vulnerability in React Server Components, a technology foundational to modern web frameworks including Next.js. The flaw, tracked under CVE-2025-55182 and GitHub Advisory GHSA-9qr9-h5gf-34mp, enables unauthenticated attackers to execute arbitrary code on affected servers by exploiting insecure deserialization within the React Flight protocol. The vulnerability was discovered in a project hosted on Vercel's platform, triggering the automated security response now making its way through affected repositories.

The exposure stems from how React Server Components handle data serialization during server-to-client communication. The React Flight protocol, which manages component streaming between server and browser environments, contains a deserialization path that fails to properly validate incoming payloads. An unauthenticated attacker capable of sending crafted requests to a vulnerable endpoint could trigger code execution at the server level, potentially compromising backend systems, extracting sensitive data, or establishing persistent access. Next.js users face particular exposure, as the framework relies directly on React Server Components for its server-side rendering architecture.

Vercel has automatically generated pull requests for affected projects, though the company warns these patches may be incomplete and advises manual review before deployment. Organizations running Next.js or other React Server Component-dependent frameworks should audit their deployments immediately, prioritize applying official patches, and implement network-level controls restricting access to server component endpoints. The coordinated disclosure across React, Vercel, and Next.js advisories suggests the vulnerability affects a significant portion of the modern JavaScript ecosystem, raising the likelihood of active exploitation attempts in the wild.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: CVE-2025-55182, remote code execution, React, Next.js, Vercel
- **Credibility**: unverified
- **Published**: 2026-05-03 05:54:11
- **ID**: 79081
- **URL**: https://whisperx.ai/en/intel/79081