REACT-SERVER-DOM-PARCEL · GHSA-xqc2-xf4c-x3h3 · Package
FIX → 19.3.1 +3
Crafted payloads sent to frameworks that use React Server Components can make the server execute attacker-supplied code. The flaw is reachable only in rare cases where responses carry multiple typed arrays and an attacker-controlled value.
first public Oct 14, 2026 · 1 source
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Only apps that run React Server Components on a server, through a framework, bundler or bundler plugin that uses these packages. Apps whose React code does not use a server, or that do not use a framework or bundler supporting Server Components, are not affected.
Not affected if client-only-react, no-framework, no-server-components
Who cares next.js, node, react, react-server-components
react-server-dom-webpack, react-server-dom-parcel or react-server-dom-turbopack with Crafted payloads targeting frameworks supporting React Server Components can lead to remote code execution. This only affects extremely rare cases where responses transport multiple typed arrays and an attacker-controlled value.
We recommend updating immediately.
The vulnerability exists in versions 19.0.0 through 19.0.8, 19.1.0 through 19.1.9, 19.2.0 through 19.2.8 and 19.3.0 of:
Fixes were back ported to versions 19.0.09, 19.1.10, 19.2.9, and 19.3.1.
If you are using any of the above packages please upgrade to any of the fixed versions immediately.
If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability.
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npm ls react-server-dom-webpack react-server-dom-parcel react-server-dom-turbopack19.0.0 through 19.0.8, 19.1.0 through 19.1.9, 19.2.0 through 19.2.8 and 19.3.0Upgrade to 19.3.1 +3
react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack: 19.0.9, 19.1.10, 19.2.9 or 19.3.1 (the fixed version on your release line)