CVE-2026-23869

Published Apr 8, 2026·Updated Jul 25, 2026

NVD Description

A denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack and react-server-dom-webpack (versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4). The vulnerability is triggered by sending specially crafted HTTP requests to Server Function endpoints.The payload of the HTTP request causes excessive CPU usage for up to a minute ending in a thrown error that is catchable.

Public Exploits & PoCs2 found

PoC: mitigate-cve-2026-23869-react-server-component-loops

Technical troubleshooting repository for fixing infinite rendering vulnerability loops and resource exhaustion threats under CVE-2026-23869 cleanly.

PoC: CVE-2026-23869

POC for CVE-2026-23869

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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