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React Server Components are Vulnerable to RCE

Critical severity GitHub Reviewed Published Dec 3, 2025 in vitejs/vite-plugin-react • Updated Dec 8, 2025

Package

npm @vitejs/plugin-rsc (npm)

Affected versions

<= 0.5.2

Patched versions

0.5.3

Description

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 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.

References

@hi-ogawa hi-ogawa published to vitejs/vite-plugin-react Dec 3, 2025
Published to the GitHub Advisory Database Dec 3, 2025
Reviewed Dec 3, 2025
Last updated Dec 8, 2025

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS score

Weaknesses

Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. Learn more on MITRE.

CVE ID

No known CVE

GHSA ID

GHSA-fmh4-wr37-44fp

Source code

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