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CVE CVE-2026-23869

CVE-2026-23869

React

Severity: HIGH
CVSS: 7.5CVSS
Published: 2026-04-08
Last modified: 2026-04-08
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-400CWE-502

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.

References

https://github.com/facebook/react/security/advisories/GHSA-479c-33wc-g2pg

Summary

Description

References