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Fix React Server Components RCE vulnerability#1

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vercel/react-flightnextjs-rce-vulnera-hkpvkz
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Fix React Server Components RCE vulnerability#1
vercel[bot] wants to merge 1 commit intomasterfrom
vercel/react-flightnextjs-rce-vulnera-hkpvkz

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@vercel vercel bot commented Dec 8, 2025

Important

This is an automatic PR generated by Vercel to help you with patching efforts. We can't guarantee it's comprehensive, and it may contain mistakes. Please review our guidance before merging these changes.

A critical remote code execution (RCE) vulnerability in React Server Components, impacting frameworks such as Next.js, was identified in the project pod-castify. The vulnerability enables unauthenticated RCE on the server via insecure deserialization in the React Flight protocol.

This issue is tracked under:

This automated pull request upgrades the affected React and Next.js packages to patched versions that fully remediate the issue.

More Info | security@vercel.com

# React Flight / Next.js RCE Advisory - Vulnerability Remediation

## Summary
The PodCastify project has been assessed and remediated against the React Flight / Next.js RCE advisory. The project was using a vulnerable version of Next.js and has been patched to the safe version.

## Vulnerability Assessment & Remediation

### Project Configuration
- **Project Type**: Next.js Application
- **Main package.json**: ./package.json
- **Monorepo Structure**: No (single package.json only)
- **Package Manager**: npm

### Affected Packages Analysis

#### Next.js
- **Previous Version**: `^15.3.3` (vulnerable)
- **Current Version**: `15.3.6` (patched)
- **Advisory Requirement**: For 15.3.x, upgrade to `15.3.6`
- **Status**: ✅ FIXED

#### React Flight Packages
- **Status**: NOT USED
- Checked for:
  - `react-server-dom-webpack` - NOT FOUND
  - `react-server-dom-parcel` - NOT FOUND
  - `react-server-dom-turbopack` - NOT FOUND

#### React Dependencies
- **react**: `^19.1.0` (compatible with Next.js 15.3.6)
- **react-dom**: `^19.1.0` (compatible with Next.js 15.3.6)
- **Status**: ✅ COMPATIBLE (No changes required)

## Changes Made

### Files Modified
1. **package.json**
   - Updated Next.js from `^15.3.3` to `15.3.6` (pinned exact version)
   - This ensures the patched version is always used and prevents regression to vulnerable versions

2. **package-lock.json**
   - Updated Next.js and all related dependencies from 15.3.3 to 15.3.6
   - Updated dependency checksums and integrity hashes
   - All transitive dependencies properly resolved to patched versions

### Files Created
1. **.vade-report**
   - This assessment and remediation report

## Verification

### Build Status
- **Next.js Compilation**: ✅ SUCCESSFUL
  - Compiled without dependency-related errors
  - All vulnerabilities resolved
  
### Security Status
- ✅ Project is no longer vulnerable to React Flight / Next.js RCE advisory
- ✅ All dependencies properly pinned to safe versions
- ✅ Lockfile correctly reflects patched versions

## Implementation Details

The fix follows the advisory guidance:
- Next.js 15.3.x was upgraded to 15.3.6 (the patched version for that minor)
- Version is pinned explicitly to prevent future downgrades
- React and React-DOM are left unchanged as they are automatically managed by Next.js
- No React Flight packages are present, so no additional patches needed

## Conclusion

The project is now fully protected against the React Flight / Next.js RCE advisory. The vulnerability has been successfully remediated by upgrading Next.js to version 15.3.6 and updating the lockfile to reflect the patched dependencies.

Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>
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vercel bot commented Dec 8, 2025

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Project Deployment Preview Comments Updated (UTC)
pod-castify Ready Ready Preview Comment Dec 8, 2025 11:30am

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