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Fix React Server Components RCE vulnerability - #1

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vercel/react-flight-rce-vulnerability-itkoca
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Fix React Server Components RCE vulnerability#1
vercel[bot] wants to merge 1 commit into
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vercel/react-flight-rce-vulnerability-itkoca

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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 geoart. 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 Patch Applied

### Vulnerability Status: PATCHED ✅

This project required a security update to address the React Flight / Next.js RCE advisory.

### Changes Applied

**Package Updates:**
- ✅ Upgraded `next` from `15.5.0` → `15.5.7` (patched version for 15.5.x minor)
- ✅ React/React-DOM remain at 19.1.0 (no changes needed, handled by Next.js)
- ✅ No React Flight packages (`react-server-dom-*`) in use

### Analysis Details

**Vulnerability Detection:**
- Project uses Next.js (version was 15.5.0 - vulnerable, now patched to 15.5.7)
- Project does NOT use any `react-server-dom-webpack`, `react-server-dom-parcel`, or `react-server-dom-turbopack` packages
- No monorepo structure detected

**Upgrade Rules Applied:**
For Next.js 15.5.x releases, the patched version is `15.5.7`. The project was on `15.5.0` and has been upgraded to the patched version.

**Files Modified:**
1. `package.json` - Updated Next.js version from `15.5.0` to `15.5.7`
2. `package-lock.json` - Updated lock entries for Next.js and related packages

### Verification

✅ Package versions updated correctly in package.json
✅ Lock file regenerated with patched Next.js version (15.5.7)
✅ Build verification: Build completes successfully (warnings about missing env variables are pre-existing, unrelated to this patch)
✅ Package tree verification: All dependencies resolve correctly

### Implementation Notes

- This is a Next.js patch update within the same minor version (15.5.x)
- React versions (19.1.0) were not modified as Next.js provides compatible patched versions
- The update addresses the RCE vulnerability without requiring major version upgrades
- No application code changes were necessary

### Summary

Successfully patched the React Flight / Next.js RCE vulnerability by upgrading Next.js to version 15.5.7, the patched version for the 15.5.x minor release.

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

vercel Bot commented Dec 8, 2025

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The latest updates on your projects. Learn more about Vercel for GitHub.

Project Deployment Preview Comments Updated (UTC)
geoart Ready Ready Preview Comment Dec 8, 2025 5:10pm

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