React Server Components Vulnerability Lets Attackers Freeze Next.js Servers With a Single Request
CVE-2026-23870 lets attackers freeze React 19 Server Components and Next.js servers with one crafted POST.
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CVE-2026-23870
- CVSS 3.1
- 7.5 high
- EPSS
- 2%p73
- Published
- ·
- Modified
Description · NVD
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).
- Vendors
- Products
- react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack
- Weakness
- CWE-400
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
In the news
2 storiesReact Server Components Flaw Lets Attackers Freeze Next.js Servers With a Single POST Request
CVE-2026-23870 lets attackers freeze vulnerable Next.js servers with one crafted POST to React Server Functions.
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