CVE-2026-23870: Facebook React-Server-Dom-Parcel

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to server crashes, out-of-memory exceptions or excessive CPU usage; affecting the following packages: react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack (versions 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5).

Affected products

• Facebook React-Server-Dom-Parcel: from 19.0.0, up to and including 19.0.5; from 19.1.0, up to and including 19.1.6; from 19.2.0, up to and including 19.2.5
• Facebook React-Server-Dom-Turbopack: from 19.0.0, up to and including 19.0.5; from 19.1.0, up to and including 19.1.6; from 19.2.0, up to and including 19.2.5
• Facebook React-Server-Dom-Webpack: from 19.0.0, up to and including 19.0.5; from 19.1.0, up to and including 19.1.6; from 19.2.0, up to and including 19.2.5

Published 2026-05-06. Last modified 2026-08-12.