Vulnerability · Published Dec 11, 2025 · Assigned by Meta
CVE-2025-55183
Medium 5.3
In plain English
A medium-severity security flaw in react-server-dom-parcel from Meta. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 64.2% (higher than 99.2% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | react-server-dom-parcel | 19.0.2 | GHSA-925w-6v3x-g4j4 |
| npm | react-server-dom-parcel | 19.1.3 | GHSA-925w-6v3x-g4j4 |
| npm | react-server-dom-parcel | 19.2.2 | GHSA-925w-6v3x-g4j4 |
| npm | react-server-dom-turbopack | 19.1.3 | GHSA-925w-6v3x-g4j4 |
| npm | react-server-dom-turbopack | 19.2.2 | GHSA-925w-6v3x-g4j4 |
| npm | react-server-dom-turbopack | 19.0.2 | GHSA-925w-6v3x-g4j4 |
| npm | react-server-dom-webpack | 19.1.3 | GHSA-925w-6v3x-g4j4 |
| npm | react-server-dom-webpack | 19.2.2 | GHSA-925w-6v3x-g4j4 |
| npm | react-server-dom-webpack | 19.0.2 | GHSA-925w-6v3x-g4j4 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Meta | react-server-dom-webpack | 19.0.0 – through 19.0.119.1.0 – through 19.1.219.2.0 – through 19.2.1 |
| Meta | react-server-dom-turbopack | 19.0.0 – through 19.0.119.1.0 – through 19.1.219.2.0 – through 19.2.1 |
| Meta | react-server-dom-parcel | 19.0.0 – through 19.0.119.1.0 – through 19.1.219.2.0 – through 19.2.1 |