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HIGHCVE-2026-23864Published Modified CNA Meta

CVE-2026-23864: Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack

Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack. The vulnerabilities are triggered by sending specially crafted HTTP requests to Server Function endpoints, and could lead to server crashes, out-of-memory exceptions or excessive CPU usage; depending on the vulnerable code path being exercised, the application configuration and application code. Strongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components.

Metrics

CVSS v3.1
7.5
Severity
HIGH
Fixed in
19.0.4
Affected Products
3

Fix available

19.0.419.1.519.2.4
Affected packages
  • Meta / react-server-dom-webpack
    < 19.0.4 (from 19.0.0) · < 19.1.5 (from 19.1.0) · < 19.2.4 (from 19.2.0)
  • Meta / react-server-dom-turbopack
    < 19.0.4 (from 19.0.0) · < 19.1.5 (from 19.1.0) · < 19.2.4 (from 19.2.0)
  • Meta / react-server-dom-parcel
    < 19.0.4 (from 19.0.0) · < 19.1.5 (from 19.1.0) · < 19.2.4 (from 19.2.0)
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References