## Critical RCE Vulnerability in React Server Components Tracked as CVE-2025-55182, CVE-2025-66478
A critical remote code execution vulnerability has been identified in React Server Components, specifically targeting the React Flight protocol's deserialization mechanism. The flaw, affecting frameworks including Next.js, enables unauthenticated RCE on exposed server environments. The vulnerability was discovered within the Vercel-hosted project rating-website, prompting automated security responses from the platform.

The exposure traces to insecure deserialization handling within the React Flight protocol, a pathway that allows server-side code execution without authentication credentials. Multiple tracking identifiers have been assigned across different ecosystems: GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React Advisory CVE-2025-55182, and Next.js Advisory CVE-2025-66478. Vercel has generated an automated pull request to assist with patching efforts, though officials caution that the automated fix may not be comprehensive and requires manual review before integration.

The disclosure raises significant security pressure on projects relying on React Server Components, particularly those deployed on Next.js infrastructure. Organizations with affected deployments are advised to review Vercel's additional guidance documentation before applying any patches. The breadth of exposure remains under assessment, though the protocol-level nature of the flaw suggests potential impact across any application leveraging vulnerable versions of the technology stack. Security teams should prioritize evaluation of their specific configurations against the documented deserialization pathway.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: react-server-components, remote-code-execution, cve-2025-55182, cve-2025-66478, next.js
- **Credibility**: unverified
- **Published**: 2026-04-24 02:54:11
- **ID**: 76629
- **URL**: https://whisperx.ai/en/intel/76629