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CVE-2025-55182 — Vulnerability in react-server-dom-parcel — CVE...

CRITICAL
Actively Exploited

React Server Components are Vulnerable to RCE

Published December 3, 2025Updated December 9, 2025Source: osv

What Should I Do?

Patch Immediately

This vulnerability is confirmed under active exploitation (CISA KEV). Patch within 24-48 hours if possible.

Summary

### Impact There is an unauthenticated remote code execution vulnerability in React Server Components. We recommend upgrading immediately. The vulnerability is present in versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 of: * [react-server-dom-webpack](https://www.npmjs.com/package/react-server-dom-webpack) * [react-server-dom-parcel](https://www.npmjs.com/package/react-server-dom-parcel) * [react-server-dom-turbopack](https://www.npmjs.com/package/react-server-dom-turbopack?activeTab=readme) ### Patches A fix was introduced in versions [19.0.1](https://github.com/facebook/react/releases/tag/v19.0.1), [19.1.2](https://github.com/facebook/react/releases/tag/v19.1.2), and [19.2.1](https://github.com/facebook/react/releases/tag/v19.2.1). If you are using any of the above packages please upgrade to any of the fixed versions immediately. If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability. ### References See the [blog post](https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components) for more information and upgrade instructions.

Advisory Timeline

  • First published December 3, 2025 (313 days ago).
  • Last revised December 9, 2025 — 6 days after initial publication.
  • Added to CISA's Known Exploited Vulnerabilities catalog 1 day after publication.

Remediation

Upgrade to the fixed version using your package manager.

npm
Update react-server-dom-parcel to 19.1.2 or later
npm install react-server-dom-parcel@19.1.2
npm
Update react-server-dom-webpack to 19.0.1 or later
npm install react-server-dom-webpack@19.0.1
npm
Update react-server-dom-turbopack to 19.2.1 or later
npm install react-server-dom-turbopack@19.2.1
npm
Update react-server-dom-webpack to 19.1.2 or later
npm install react-server-dom-webpack@19.1.2
npm
Update react-server-dom-parcel to 19.0.1 or later
npm install react-server-dom-parcel@19.0.1
npm
Update react-server-dom-webpack to 19.2.1 or later
npm install react-server-dom-webpack@19.2.1
npm
Update react-server-dom-turbopack to 19.0.1 or later
npm install react-server-dom-turbopack@19.0.1
npm
Update react-server-dom-turbopack to 19.1.2 or later
npm install react-server-dom-turbopack@19.1.2
npm
Update react-server-dom-parcel to 19.2.1 or later
npm install react-server-dom-parcel@19.2.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (9)

Affects 1 ecosystem: npm (3).

PackageEcosystemAffectedFixed In
react-server-dom-parcel
npm
All versions19.1.2
react-server-dom-webpack
npm
19.0.019.0.1
react-server-dom-turbopack
npm
19.2.019.2.1
react-server-dom-webpack
npm
All versions19.1.2
react-server-dom-parcel
npm
19.0.019.0.1
react-server-dom-webpack
npm
19.2.019.2.1
react-server-dom-turbopack
npm
19.0.019.0.1
react-server-dom-turbopack
npm
All versions19.1.2
react-server-dom-parcel
npm
19.2.019.2.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-502
    Deserialization of Untrusted DataMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 10.0 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2025-55182?
React Server Components are Vulnerable to RCE This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 10.0/10).
How do I check if my project is affected by CVE-2025-55182?
CVE-2025-55182 affects react-server-dom-parcel, react-server-dom-webpack and react-server-dom-turbopack. This vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, meaning it is being actively exploited in the wild. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-55182 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
10.0

Exploitation is straightforward and causes maximum impact. Patch immediately.

Known Exploited Vulnerability

This vulnerability is in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild.

Added to KEV catalog: December 5, 2025

Remediation deadline: December 12, 2025

Also Known As

GHSA-fv66-9v8q-g76r

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