CVE-2026-23870: Facebook React has a Denial of Service Vulnerability in React Server Components

May 11, 2026

A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to out-of-memory exceptions or excessive CPU usage.

We recommend updating immediately.

The vulnerability exists in versions 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5 of:

react-server-dom-webpack react-server-dom-parcel react-server-dom-turbopack

References

github.com/advisories/GHSA-rv78-f8rc-xrxh
github.com/facebook/react/security/advisories/GHSA-rv78-f8rc-xrxh
github.com/vercel/next.js/security/advisories/GHSA-8h8q-6873-q5fj
github.com/vitejs/vite-plugin-react/security/advisories/GHSA-w94c-4vhp-22gx
nvd.nist.gov/vuln/detail/CVE-2026-23870

Code Behaviors & Features

Detect and mitigate CVE-2026-23870 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →