## Critical RCE Vulnerability in React Server Components Exposes Next.js Applications to Unauthorized Server Code Execution
A critical remote code execution vulnerability has been identified in React Server Components, posing a significant threat to applications built on frameworks including Next.js. The flaw, traced through insecure deserialization within the React Flight protocol, enables unauthenticated attackers to execute arbitrary code on affected servers. The vulnerability was discovered in the "dank-diary" project hosted on Vercel's platform, triggering an automated security response from the infrastructure provider.

The exposure is tracked under three separate security advisories: GitHub Security Advisory GHSA-9qr9-h5gf-34mp, React advisory CVE-2025-55182, and Next.js advisory CVE-2025-66478. Vercel has automatically generated a pull request to patch the vulnerable dependencies in affected projects, though officials caution that the automated fix may not be comprehensive and manual review is required before merging. The incomplete nature of the automated patch introduces additional risk for projects that deploy without proper security vetting.

The vulnerability raises serious concerns for organizations running React Server Components in production environments. Attackers exploiting this flaw could gain full server-side access, potentially compromising sensitive data, manipulating application behavior, or using compromised infrastructure as a pivot point for broader network intrusions. Security teams are advised to review the linked advisories immediately, evaluate their exposure, and apply patches only after thorough testing. The presence of a publicly documented exploit path increases the likelihood of opportunistic attacks targeting unpatched instances.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: RCE vulnerability, React Server Components, Next.js, CVE-2025-55182, insecure deserialization
- **Credibility**: unverified
- **Published**: 2026-05-13 09:48:27
- **ID**: 82558
- **URL**: https://whisperx.ai/en/intel/82558