# CVE-2025-55182: React Server Components are Vulnerable to RCE

Source: https://junglewise.ai/threats/cve-2025-55182-meta-react-server-components-remote-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-03. Updated: 2026-05-15  
License: CC BY 4.0 with a link back

CVE-2025-55182 · Severity: critical · CVSS 10 · Exploited in the wild · Published 2025-12-03

A critical vulnerability exists in Meta's React Server Components, a technology used to build modern web applications. An attacker can remotely take control of a web server by sending a specially crafted request to the application's server-side functions. This flaw is being actively exploited in the wild and can lead to full system compromise, data theft, or service disruption.

Technologies: [react-server-dom-parcel (npm)](https://junglewise.ai/threats/technologies/react-server-dom-parcel), [react-server-dom-turbopack (npm)](https://junglewise.ai/threats/technologies/react-server-dom-turbopack), [react-server-dom-webpack (npm)](https://junglewise.ai/threats/technologies/react-server-dom-webpack), [Vercel Next.js](https://junglewise.ai/threats/technologies/next-js). Vendors: [Meta](https://junglewise.ai/threats/vendors/meta), [npm](https://junglewise.ai/threats/vendors/npm), [Vercel](https://junglewise.ai/threats/vendors/vercel).

## Quick answers

**Is CVE-2025-55182 exploited in the wild?** Yes. CVE-2025-55182 is known to be exploited in the wild, first recorded on 5 December 2025. Treat it as urgent.

**How severe is CVE-2025-55182?** Critical severity, with a CVSS score of 10, published 3 December 2025.

**Which products and versions are affected?** Meta React Server Components 19.0.0, 19.1.0, 19.1.1, 19.2.0; react-server-dom-parcel (npm) SEMVER:introduced=19.0.0,fixed=19.0.1; react-server-dom-turbopack (npm) SEMVER:introduced=19.0.0,fixed=19.0.1; react-server-dom-webpack (npm) SEMVER:introduced=19.0.0,fixed=19.0.1; and 1 more.

**Is there a fix for CVE-2025-55182?** Yes. react-server-dom-parcel (npm): upgrade to 19.0.1 or later; react-server-dom-turbopack (npm): upgrade to 19.0.1 or later; react-server-dom-webpack (npm): upgrade to 19.0.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2025-55182 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2025-55182?** Check whether you run Meta React Server Components, react-server-dom-parcel (npm), react-server-dom-turbopack (npm) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- react-server-dom-parcel (npm): upgrade to 19.0.1 or later

  ```sh
  npm install react-server-dom-parcel@19.0.1
  ```

- react-server-dom-turbopack (npm): upgrade to 19.0.1 or later

  ```sh
  npm install react-server-dom-turbopack@19.0.1
  ```

- react-server-dom-webpack (npm): upgrade to 19.0.1 or later

  ```sh
  npm install react-server-dom-webpack@19.0.1
  ```


## Technical details

A remote code execution (RCE) vulnerability exists in React Server Components (RSC) due to the unsafe deserialization of untrusted data (CWE-502). The flaw resides in how the library decodes payloads sent to React Server Function endpoints via HTTP requests. An unauthenticated remote attacker can exploit this by sending a malicious payload to these endpoints, leading to arbitrary code execution on the server. The vulnerability affects the react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack packages. This issue has been observed being exploited in the wild by threat actors. Patches are available from Meta and in downstream frameworks like Next.js.

## Affected products

- Meta React Server Components 19.0.0, 19.1.0, 19.1.1, 19.2.0
- Vercel Next.js 15.0.0 to 15.0.4, 15.1.0 to 15.1.8, 15.2.0 to 15.2.5, 15.3.0 to 15.3.5, 15.4.0 to 15.4.7, 15.5.0 to 15.5.6, 15.6.0, 16.0.0 to 16.0.6

## Identifiers

- CVE-2025-55182
- GHSA-fv66-9v8q-g76r

## Timeline

- 2025-12-03: advisory: Vendor advisory and patch published by Meta
- 2025-12-05: disclosed: CVE-2025-55182 published
- 2025-12-05: kev added: Added to CISA Known Exploited Vulnerabilities catalog

## Related threats

- [React Server Components remote code execution via deserialization](https://junglewise.ai/threats/cve-2026-126187-react-unauthenticated-remote-code-execution-in-react-server)
- [Vercel Next.js remote code execution in use cache functions](https://junglewise.ai/threats/next-js-unauthenticated-remote-code-execution-in-use-cache-functions-ac3e73d3)
- [Next.js denial of service in App Router with Server Actions](https://junglewise.ai/threats/cve-2026-94482-next-js-denial-of-service-in-app-router-using-server-actions)
- [Next.js unauthenticated remote code execution in Image Optimization API](https://junglewise.ai/threats/next-js-unauthenticated-remote-code-execution-in-image-optimization-api-f1b22a87)
- [Next.js information disclosure in Draft Mode via use cache](https://junglewise.ai/threats/cve-2026-94544-next-js-is-a-react-framework-for-building-full-stack-web)