WS-2026-0151
Published:October 14, 2026
Updated:October 22, 2026
react-server-dom-webpack/-turbopack 19.0.0-19.0.8 (and 19.0.0 beta/rc builds), react-server-dom-webpack/-turbopack/-parcel 19.1.0-19.1.9, 19.2.0-19.2.8, 19.3.0 (and 19.x canary builds before the fix): the Server Functions reply decoder rescans the whole submitted FormData for referenced form data and stream chunks and keeps every field in one shared store, so a crafted request causes excessive CPU use or out-of-memory (denial of service) (GHSA-h3gv-c5rc-p453)
Affected Packages
https://github.com/facebook/react.git (GITHUB):
Affected version(s) >=v19.0.0 <v19.0.9Fix Suggestion:
Update to version v19.0.9https://github.com/facebook/react.git (GITHUB):
Affected version(s) >=v19.2.0 <v19.2.9Fix Suggestion:
Update to version v19.2.9https://github.com/facebook/react.git (GITHUB):
Affected version(s) =v19.3.0 <v19.3.1Fix Suggestion:
Update to version v19.3.1https://github.com/facebook/react.git (GITHUB):
Affected version(s) >=v19.1.0 <v19.1.10Fix Suggestion:
Update to version v19.1.10react-server-dom-turbopack (NPM):
Affected version(s) >=19.1.0 <19.1.10Fix Suggestion:
Update to version 19.1.10react-server-dom-webpack (NPM):
Affected version(s) >=19.1.0 <19.1.10Fix Suggestion:
Update to version 19.1.10react-server-dom-webpack (NPM):
Affected version(s) >=19.2.0 <19.2.9Fix Suggestion:
Update to version 19.2.9react-server-dom-webpack (NPM):
Affected version(s) >=19.0.0-beta-b498834eab-20240506 <19.0.9Fix Suggestion:
Update to version 19.0.9react-server-dom-turbopack (NPM):
Affected version(s) >=19.0.0-beta-b498834eab-20240506 <19.0.9Fix Suggestion:
Update to version 19.0.9react-server-dom-turbopack (NPM):
Affected version(s) >=19.3.0 <19.3.1Fix Suggestion:
Update to version 19.3.1react-server-dom-webpack (NPM):
Affected version(s) >=19.3.0 <19.3.1Fix Suggestion:
Update to version 19.3.1react-server-dom-parcel (NPM):
Affected version(s) >=19.2.0 <19.2.9Fix Suggestion:
Update to version 19.2.9react-server-dom-parcel (NPM):
Affected version(s) >=19.1.0 <19.1.10Fix Suggestion:
Update to version 19.1.10react-server-dom-parcel (NPM):
Affected version(s) >=19.3.0 <19.3.1Fix Suggestion:
Update to version 19.3.1react-server-dom-turbopack (NPM):
Affected version(s) >=19.2.0 <19.2.9Fix Suggestion:
Update to version 19.2.9Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH