CVE-2026-23870

HIGH CVSS 3.1: 7.5 EPSS 1.53%
Updated Oct 26, 2026
Facebook
Parameter Value
CVSS 7.5 (HIGH)
Affected Versions 19.0.0 — 19.2.5
Type CWE-400 (Uncontrolled Resource Consumption)
Vendor Facebook
Public PoC No

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).

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 9

Configuration From (including) Up to (excluding)
Facebook React-Server-Dom-Parcel
cpe:2.3:a:facebook:react-server-dom-parcel:*:*:*:*:*:node.js:*:*
19.0.0 <= 19.0.5
Facebook React-Server-Dom-Parcel
cpe:2.3:a:facebook:react-server-dom-parcel:*:*:*:*:*:node.js:*:*
19.1.0 <= 19.1.6
Facebook React-Server-Dom-Parcel
cpe:2.3:a:facebook:react-server-dom-parcel:*:*:*:*:*:node.js:*:*
19.2.0 <= 19.2.5
Facebook React-Server-Dom-Turbopack
cpe:2.3:a:facebook:react-server-dom-turbopack:*:*:*:*:*:node.js:*:*
19.0.0 <= 19.0.5
Facebook React-Server-Dom-Turbopack
cpe:2.3:a:facebook:react-server-dom-turbopack:*:*:*:*:*:node.js:*:*
19.1.0 <= 19.1.6
Facebook React-Server-Dom-Turbopack
cpe:2.3:a:facebook:react-server-dom-turbopack:*:*:*:*:*:node.js:*:*
19.2.0 <= 19.2.5
Facebook React-Server-Dom-Webpack
cpe:2.3:a:facebook:react-server-dom-webpack:*:*:*:*:*:node.js:*:*
19.0.0 <= 19.0.5
Facebook React-Server-Dom-Webpack
cpe:2.3:a:facebook:react-server-dom-webpack:*:*:*:*:*:node.js:*:*
19.1.0 <= 19.1.6
Facebook React-Server-Dom-Webpack
cpe:2.3:a:facebook:react-server-dom-webpack:*:*:*:*:*:node.js:*:*
19.2.0 <= 19.2.5