Vulnerability GHSA-rv78-f8rc-xrxh

High Risk
HIGH RISK
CVSS Score: 7.5
Score Range: 7.0–8.9
High severity vulnerabilities (CVSS 7.0–8.9). Serious vulnerabilities that should be prioritized soon after critical fixes.
6 months ago
May 11, 2026 at 02:50 PM UTC
Facebook React has a Denial of Service Vulnerability in React Server Components
19.1.0 - 19.1.6 and 19.2.0 - 19.2.5
19.1.0 - 19.1.6 and 19.2.0 - 19.2.5

Summary

Facebook React has a Denial of Service Vulnerability in React Server Components

Details

Impact

A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to out-of-memory exceptions or excessive CPU usage.

We recommend updating immediately.

The vulnerability exists in versions 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5 of:

react-server-dom-webpack react-server-dom-parcel react-server-dom-turbopack

Patches

Fixes were back ported to versions 19.0.6, 19.1.7, and 19.2.6.

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.

References See the blog post for more information and upgrade instructions.

Timeline

Published
6 months ago
May 11, 2026 at 02:50 PM UTC
Fixed (19.2.6)
6 months ago
May 06, 2026 at 04:17 PM UTC
Fixed (19.2.6)
6 months ago
May 06, 2026 at 04:17 PM UTC
Fixed (19.2.6)
6 months ago
May 06, 2026 at 04:17 PM UTC
Fixed (19.1.7)
6 months ago
May 06, 2026 at 04:17 PM UTC
Fixed (19.1.7)
6 months ago
May 06, 2026 at 04:17 PM UTC
Fixed (19.1.7)
6 months ago
May 06, 2026 at 04:17 PM UTC
Fixed (19.0.6)
6 months ago
May 06, 2026 at 04:18 PM UTC
Fixed (19.0.6)
6 months ago
May 06, 2026 at 04:18 PM UTC
Last Modified
6 months ago
May 11, 2026 at 03:11 PM UTC