WS-2026-0170
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 React Server Components response writer emits typed arrays as views over their whole underlying ArrayBuffer and writes large chunks without copying, so a response that transports several typed arrays sharing one buffer plus an attacker-controlled value can corrupt the transported stream, leading to remote code execution (GHSA-xqc2-xf4c-x3h3)
Affected Packages
https://github.com/facebook/react.git (GITHUB):
Affected version(s) >=v19.1.0 <v19.1.10Fix Suggestion:
Update to version v19.1.10https://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) =v19.3.0 <v19.3.1Fix Suggestion:
Update to version v19.3.1https://github.com/facebook/react.git (GITHUB):
Affected version(s) >=v19.2.0 <v19.2.9Fix Suggestion:
Update to version v19.2.9react-server-dom-parcel (NPM):
Affected version(s) >=19.1.0 <19.1.10Fix Suggestion:
Update to version 19.1.10react-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) >=19.1.0 <19.1.10Fix Suggestion:
Update to version 19.1.10react-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) >=19.2.0 <19.2.9Fix Suggestion:
Update to version 19.2.9react-server-dom-webpack (NPM):
Affected version(s) >=19.3.0 <19.3.1Fix Suggestion:
Update to version 19.3.1react-server-dom-webpack (NPM):
Affected version(s) >=19.0.1 <19.0.9Fix Suggestion:
Update to version 19.0.9react-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 19.2.9react-server-dom-parcel (NPM):
Affected version(s) >=19.2.0 <19.2.9Fix Suggestion:
Update to version 19.2.9react-server-dom-turbopack (NPM):
Affected version(s) >=19.0.1 <19.0.9Fix Suggestion:
Update to version 19.0.9Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.5
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Deserialization of Untrusted Data