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High · 7.5 Public exploit CVE-2026-23870 EUVD-2026-27867GHSA-rv78-f8rc-xrxh

Facebook React has a Denial of Service Vulnerability in React Server Components

Published May 6, 2026 · Updated May 6, 2026 · Assigned by Meta

Vendor: Meta Product: react-server-dom-parcel Product: react-server-dom-turbopack Product: react-server-dom-webpack Package: react-server-dom-parcel Package: react-server-dom-turbopack Package: react-server-dom-webpack Ecosystem: npm

Description

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

VendorProductAffectedFixed
Meta react-server-dom-turbopack 19.0.0 – ≤ 19.0.5, 19.1.0 – ≤ 19.1.6, 19.2.0 – ≤ 19.2.5 —
Meta react-server-dom-parcel 19.0.0 – ≤ 19.0.5, 19.1.0 – ≤ 19.1.6, 19.2.0 – ≤ 19.2.5 —
Meta react-server-dom-webpack 19.0.0 – ≤ 19.0.5, 19.1.0 – ≤ 19.1.6, 19.2.0 – ≤ 19.2.5 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 2 repositories

  • dwisiswant0/next-16.2.4-pocs ★ 184 · May 7, 2026

    Next.js v16.2.4 Security PoC Collection (CVE-2026-23870, CVE-2026-44575, CVE-2026-44579, CVE-2026-44574, CVE-2026-44578, CVE-2026-44573, CVE-2026-44581, CVE-2026-44580, CVE-2026-44577, CVE-2026-44576…

  • emresandikci/nextjs-cve-2026-23870-checker ★ 1 · May 13, 2026

    Checker and fixer for all 13 vulnerabilities in the Next.js May 2026 security release (CVE-2026-23870)

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Affected packages

EcosystemPackageAffectedFixedRecord
npm react-server-dom-parcel >= 19.0.0, < 19.0.6 19.0.6 GHSA-rv78-f8rc-xrxh
npm react-server-dom-parcel >= 19.1.0, < 19.1.7 19.1.7 GHSA-rv78-f8rc-xrxh
npm react-server-dom-parcel >= 19.2.0, < 19.2.6 19.2.6 GHSA-rv78-f8rc-xrxh
npm react-server-dom-turbopack >= 19.0.0, < 19.0.6 19.0.6 GHSA-rv78-f8rc-xrxh
npm react-server-dom-turbopack >= 19.1.0, < 19.1.7 19.1.7 GHSA-rv78-f8rc-xrxh
npm react-server-dom-turbopack >= 19.2.0, < 19.2.6 19.2.6 GHSA-rv78-f8rc-xrxh
npm react-server-dom-webpack >= 19.0.0, < 19.0.6 19.0.6 GHSA-rv78-f8rc-xrxh
npm react-server-dom-webpack >= 19.1.0, < 19.1.7 19.1.7 GHSA-rv78-f8rc-xrxh
npm react-server-dom-webpack >= 19.2.0, < 19.2.6 19.2.6 GHSA-rv78-f8rc-xrxh

Advisories 1

References