Vulnerability · Published Dec 11, 2025 · Assigned by Meta
CVE-2025-67779
High 7.5
In plain English
A high-severity unsafe deserialization in react-server-dom-parcel from Meta. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 20.0% (higher than 97% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
It was found that the fix addressing CVE-2025-55184 in React Server Components was incomplete and does not prevent a denial of service attack in a specific case. React Server Components versions 19.0.2, 19.1.3 and 19.2.2 are affected, allowing unsafe deserialization of payloads from HTTP requests to Server Function endpoints. This 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 | 19.0.3 | GHSA-7gmr-mq3h-m5h9 |
| npm | react-server-dom-parcel | 19.1.4 | GHSA-7gmr-mq3h-m5h9 |
| npm | react-server-dom-parcel | 19.2.3 | GHSA-7gmr-mq3h-m5h9 |
| npm | react-server-dom-turbopack | 19.0.3 | GHSA-7gmr-mq3h-m5h9 |
| npm | react-server-dom-turbopack | 19.1.4 | GHSA-7gmr-mq3h-m5h9 |
| npm | react-server-dom-turbopack | 19.2.3 | GHSA-7gmr-mq3h-m5h9 |
| npm | react-server-dom-webpack | 19.0.3 | GHSA-7gmr-mq3h-m5h9 |
| npm | react-server-dom-webpack | 19.1.4 | GHSA-7gmr-mq3h-m5h9 |
| npm | react-server-dom-webpack | 19.2.3 | GHSA-7gmr-mq3h-m5h9 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Meta | react-server-dom-parcel | 19.0.2 – through 19.0.219.1.3 – through 19.1.319.2.2 – through 19.2.2 |
| Meta | react-server-dom-turbopack | 19.0.2 – through 19.0.219.1.3 – through 19.1.319.2.2 – through 19.2.2 |
| Meta | react-server-dom-webpack | 19.0.2 – through 19.0.219.1.3 – through 19.1.319.2.2 – through 19.2.2 |
Weakness: CWE-502, CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H