React Server Components are Vulnerable to RCE
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
- —
- Attack complexity
- —
- Impact type
- Code execution
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-502.
Summary
### Summary `@vitejs/plugin-rsc` vendors `react-server-dom-webpack`, which contained an unauthenticated remote code execution vulnerability in versions prior to 19.0.1, 19.1.2, and 19.2.1. See details in React repository's advisory https://github.com/facebook/react/security/advisories/GHSA-fv66-9v8q-g76r ### Impact Applications using affected versions of `@vitejs/plugin-rsc` are vulnerable to unauthenticated remote code execution through deserialization of untrusted data. An attacker can execute arbitrary code remotely without authentication, affecting confidentiality, integrity, and availability. ### Recommendations Upgrade immediately to `@vitejs/[email protected]` or later. ### Workarounds Applications not using server-side React or React Server Components are unaffected.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | @vitejs/plugin-rsc (npm) | before 0.5.3 | 0.5.3 | Patch available | GHSA-fmh4-wr37-44fp |
- @vitejs/plugin-rsc (npm) Vendor— Affected before 0.5.3 Fixed in 0.5.3 Patch available GHSA-fmh4-wr37-44fp
Remediation
- Fix · GHSA-fmh4-wr37-44fp @vitejs/plugin-rsc (npm) Fixed in 0.5.3 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-fmh4-wr37-44fp
References
Other 5
- https://github.com/facebook/react/security/advisories/GHSA-fv66-9v8q-g76r
- https://github.com/vercel/next.js/security/advisories/GHSA-9qr9-h5gf-34mp
- https://github.com/vitejs/vite-plugin-react/security/advisories/GHSA-fmh4-wr37-44fp
- https://github.com/vitejs/vite-plugin-react
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences