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Fix React Server Components RCE vulnerability#25

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shaaddev merged 1 commit into
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vercel/dependencies-for-react-flight-xjedz2
Dec 8, 2025
Merged

Fix React Server Components RCE vulnerability#25
shaaddev merged 1 commit into
mainfrom
vercel/dependencies-for-react-flight-xjedz2

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@vercel vercel Bot commented Dec 8, 2025

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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 application-record. 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 - Security Patches Applied

### Summary
The application-record repository was affected by the React Flight / Next.js RCE advisory (CVE-2025-21640) and has been successfully patched.

### Vulnerability Assessment

**Project Type**: Next.js 15 Application (single package.json)

**Affected Packages Detected**:
- ✅ Next.js: YES - Using `next@15.3.1` (vulnerable)
- ❌ React Flight Packages: NO - Does not use:
  - `react-server-dom-webpack`
  - `react-server-dom-parcel`
  - `react-server-dom-turbopack`

**Vulnerable Versions Found**:
- `next@15.3.1` - Vulnerable (requires 15.3.6)
- `react@19.1.0` - Vulnerable (requires 19.1.2+)
- `react-dom@19.1.0` - Vulnerable (requires 19.1.2+)

### Changes Made

**1. Updated package.json**:
- `next`: 15.3.1 → 15.3.6 (patched version for 15.3.x)
- `react`: 19.1.0 → 19.1.2 (patched from vulnerable version)
- `react-dom`: 19.1.0 → 19.1.2 (patched from vulnerable version)

**2. Updated pnpm-lock.yaml**:
- Lockfile was regenerated to reflect the patched versions
- All dependent packages were updated to use react@19.1.2 and react-dom@19.1.2
- Next.js ecosystem packages updated to work with next@15.3.6

### Verification Steps Completed

✅ **TypeScript Compilation**: Verified with `npm run build` - No syntax errors with patched dependencies
✅ **ESLint Validation**: Verified with `npm run lint` - No new linting errors introduced
✅ **Lockfile Consistency**: Confirmed pnpm-lock.yaml resolves to patched versions:
   - next@15.3.6 (from 15.3.1)
   - react@19.1.2 (from 19.1.0)
   - react-dom@19.1.2 (from 19.1.0)

### Why These Changes Are Correct

According to the advisory:
- **Next.js 15.3.x** requires upgrade to `15.3.6` - ✅ Applied
- **Vulnerable React versions** (19.1.0, 19.1.1, 19.2.0) require `19.1.2` - ✅ Applied
- **React Flight packages**: Not used by this project - No action needed
- **React/react-dom**: Next.js manages compatibility - ✅ Updated

### Files Modified
1. `/package.json` - Updated next, react, and react-dom versions
2. `/pnpm-lock.yaml` - Regenerated lockfile with patched versions

### Compatibility Notes
- The patched versions maintain backward compatibility with existing code
- No breaking changes in the Next.js 15.3.x minor version update
- React 19.1.2 is a patch release with only security fixes
- All dependent packages automatically resolve to compatible versions

### Deployment Readiness
The repository is now secure against the CVE-2025-21640 vulnerability. The application can be deployed with confidence that the React Flight RCE vulnerability has been addressed.

Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>
@vercel

vercel Bot commented Dec 8, 2025

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Project Deployment Preview Comments Updated (UTC)
application-record Ready Ready Preview Comment Dec 8, 2025 7:01pm

@shaaddev shaaddev marked this pull request as ready for review December 8, 2025 19:03
@shaaddev shaaddev merged commit fd2ebc3 into main Dec 8, 2025
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