## Critical RCE Vulnerability in React Server Components Enables Unauthenticated Server Code Execution
A critical remote code execution vulnerability has been identified in React Server Components, affecting major web development frameworks including Next.js. The flaw, stemming from insecure deserialization within the React Flight protocol, allows unauthenticated attackers to execute arbitrary code on affected servers without requiring any credentials or user interaction.

The security issue is tracked across multiple advisories: GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React Advisory CVE-2025-55182, and Next.js Advisory CVE-2025-66478. The vulnerability was discovered in a project linked to Vercel's infrastructure, prompting the platform to generate automated pull requests to assist developers with patching. Vercel has cautioned that these automated fixes may not be comprehensive and has urged recipients to review the guidance provided before merging any changes.

The critical severity stems from the combination of an unauthenticated attack vector, remote code execution capability, and the widespread deployment of React Server Components across production web infrastructure. Organizations running Next.js or other affected frameworks are advised to consult the linked security advisories immediately, assess their exposure, and apply appropriate patches without delay. The presence of automated exploitation tools in public repositories compounds the urgency for organizations to prioritize this remediation.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: CVE-2025-55182, CVE-2025-66478, GHSA-9qr9-h5gf-34mp, remote-code-execution, React
- **Credibility**: unverified
- **Published**: 2026-05-14 03:48:25
- **ID**: 82880
- **URL**: https://whisperx.ai/en/intel/82880