Vulnerability · Published Dec 11, 2025 · Assigned by Meta
CVE-2025-55184
High 7.5
In plain English
A high-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 66.6% (higher than 99.3% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
A pre-authentication denial of service vulnerability exists in 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. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints, which can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | react-server-dom-parcel | 19.0.2 | GHSA-2m3v-v2m8-q956 |
| npm | react-server-dom-parcel | 19.1.3 | GHSA-2m3v-v2m8-q956 |
| npm | react-server-dom-parcel | 19.2.2 | GHSA-2m3v-v2m8-q956 |
| npm | react-server-dom-turbopack | 19.1.3 | GHSA-2m3v-v2m8-q956 |
| npm | react-server-dom-turbopack | 19.2.2 | GHSA-2m3v-v2m8-q956 |
| npm | react-server-dom-turbopack | 19.0.2 | GHSA-2m3v-v2m8-q956 |
| npm | react-server-dom-webpack | 19.1.3 | GHSA-2m3v-v2m8-q956 |
| npm | react-server-dom-webpack | 19.2.2 | GHSA-2m3v-v2m8-q956 |
| npm | react-server-dom-webpack | 19.0.2 | GHSA-2m3v-v2m8-q956 |
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 |