Fix React Server Components RCE vulnerability#1
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React Flight / Next.js RCE Advisory - Remediation Report
VULNERABILITY STATUS: ✅ FIXED
SUMMARY:
This project was affected by the React Flight / Next.js RCE advisory due to using Next.js 15.3.1.
The vulnerability has been remediated by upgrading Next.js to the patched version.
PROJECT ANALYSIS:
1. Project Type: Next.js Application (Single-package, not a monorepo)
2. Affected Packages Detected:
✅ Next.js: next@^15.3.1 (VULNERABLE)
❌ React Flight packages: None present
- No react-server-dom-webpack
- No react-server-dom-parcel
- No react-server-dom-turbopack
3. Vulnerability Assessment Details:
a) Next.js Version Status:
BEFORE: next@^15.3.1 (VULNERABLE - 15.3.x vulnerable versions)
AFTER: next@15.3.6 (PATCHED)
According to the advisory, Next.js 15.3.x versions required patching:
- 15.3.x → 15.3.6 ✅ Applied
b) React Flight Packages:
- Status: NOT USED
- No react-server-dom-* packages detected
- No patching required for this category
4. Changes Made:
Modified Files:
- package.json:
* next: ^15.3.1 → 15.3.6
- package-lock.json:
* Updated to reflect patched dependency versions
* Verified next@15.3.6 is correctly resolved
5. Dependency Resolution:
Final resolved versions:
- next@15.3.6 ✅ (patched version)
- react@19.0.0 (managed by Next.js)
- react-dom@19.0.0 (managed by Next.js)
npm list next output confirms:
```
@once-ui-system/magic-portfolio@2.2.0
+-- @once-ui-system/core@1.3.15
| `-- next@15.3.6 deduped
`-- next@15.3.6
```
6. Build Verification:
✅ Build completed successfully with Next.js 15.3.6
✅ Static pages generated (17 pages)
✅ Production build finalized without dependency errors
Note: Pre-existing ESLint configuration warning (unrelated to RCE advisory)
has no impact on the security fix.
CONCLUSION:
The @once-ui-system/magic-portfolio project has been successfully patched against the
React Flight / Next.js RCE advisory. The vulnerable Next.js 15.3.1 dependency has been
upgraded to the patched version 15.3.6. The build completes successfully, confirming
the patch resolves correctly and does not introduce compatibility issues.
The project is now protected from the React Flight / Next.js RCE vulnerability.
Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>
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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 portfolio. The vulnerability enables unauthenticated RCE on the server via insecure deserialization in the React Flight protocol.
This issue is tracked under:
GitHub Security Advisory: GHSA-9qr9-h5gf-34mp
React Advisory: CVE-2025-55182
Next.js Advisory: CVE-2025-66478
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