Inform. Leak in React Server Components 19.0.019.2.1 via Server Function
CVE-2025-55183 Published on December 11, 2025
An information leak vulnerability exists in specific configurations of React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. A specifically crafted HTTP request sent to a vulnerable Server Function may unsafely return the source code of any Server Function. Exploitation requires the existence of a Server Function which explicitly or implicitly exposes a stringified argument.
Affected Versions
Meta react-server-dom-webpack:- Version 19.0.0, <= 19.0.1 is affected.
- Version 19.1.0, <= 19.1.2 is affected.
- Version 19.2.0, <= 19.2.1 is affected.
- Version 19.0.0, <= 19.0.1 is affected.
- Version 19.1.0, <= 19.1.2 is affected.
- Version 19.2.0, <= 19.2.1 is affected.
- Version 19.0.0, <= 19.0.1 is affected.
- Version 19.1.0, <= 19.1.2 is affected.
- Version 19.2.0, <= 19.2.1 is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2025-55183
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| npm | next | >= 16.1.0-canary.0, < 16.1.0-canary.17 | 16.1.0-canary.17 |
| npm | react-server-dom-webpack | >= 19.1.0, < 19.1.3 | 19.1.3 |
| npm | react-server-dom-turbopack | >= 19.2.0, < 19.2.2 | 19.2.2 |
| npm | react-server-dom-turbopack | >= 19.1.0, < 19.1.3 | 19.1.3 |
| npm | react-server-dom-parcel | >= 19.2.0, < 19.2.2 | 19.2.2 |
| npm | react-server-dom-parcel | >= 19.1.0, < 19.1.3 | 19.1.3 |
| npm | react-server-dom-webpack | >= 19.0.0, < 19.0.2 | 19.0.2 |
| npm | react-server-dom-turbopack | >= 19.0.0, < 19.0.2 | 19.0.2 |
| npm | react-server-dom-parcel | >= 19.0.0, < 19.0.2 | 19.0.2 |
| npm | react-server-dom-webpack | >= 19.2.0, < 19.2.2 | 19.2.2 |
| npm | next | >= 16.0.0-beta.0, < 16.0.9 | 16.0.9 |
| npm | next | >= 15.6.0-canary.0, < 15.6.0-canary.59 | 15.6.0-canary.59 |
| npm | next | >= 15.5.1-canary.0, < 15.5.8 | 15.5.8 |
| npm | next | >= 15.4.0-canary.0, < 15.4.9 | 15.4.9 |
| npm | next | >= 15.3.0-canary.0, < 15.3.7 | 15.3.7 |
| npm | next | >= 15.2.0-canary.0, < 15.2.7 | 15.2.7 |
| npm | next | >= 15.1.1-canary.0, < 15.1.10 | 15.1.10 |
| npm | next | >= 15.0.0-canary.0, < 15.0.6 | 15.0.6 |
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.