Is CVE-2026-44907 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-44907 being exploited in the wild.

How severe is CVE-2026-44907?

High severity, with a CVSS score of 7.5, published 21 July 2026.

Which products and versions are affected?

react-server-dom-parcel (npm) SEMVER:introduced=19.1.0,fixed=19.1.9; react-server-dom-turbopack (npm) SEMVER:introduced=19.0.0,fixed=19.0.8; react-server-dom-webpack (npm) SEMVER:introduced=19.0.0,fixed=19.0.8.

Is there a fix for CVE-2026-44907?

Yes. react-server-dom-parcel (npm): upgrade to 19.1.9 or later; react-server-dom-turbopack (npm): upgrade to 19.0.8 or later; react-server-dom-webpack (npm): upgrade to 19.0.8 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-44907 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-44907?

Check whether you run react-server-dom-parcel (npm), react-server-dom-turbopack (npm) or react-server-dom-webpack (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-44907: Meta React denial of service in Server Functions

CVE-2026-44907 · Severity: high · CVSS 7.5 · Published 2026-07-21

A denial of service vulnerability exists in React's server-side rendering components used to handle Server Functions. An attacker can send specially crafted web requests to crash the application or make it unresponsive by exhausting its memory and processing power. This can lead to service outages and impact the availability of web applications built with React Server Components.

Technologies: react-server-dom-parcel (npm), react-server-dom-turbopack (npm), react-server-dom-webpack (npm). Vendors: npm.

Quick answers

Is CVE-2026-44907 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-44907 being exploited in the wild.
How severe is CVE-2026-44907?: High severity, with a CVSS score of 7.5, published 21 July 2026.
Which products and versions are affected?: react-server-dom-parcel (npm) SEMVER:introduced=19.1.0,fixed=19.1.9; react-server-dom-turbopack (npm) SEMVER:introduced=19.0.0,fixed=19.0.8; react-server-dom-webpack (npm) SEMVER:introduced=19.0.0,fixed=19.0.8.
Is there a fix for CVE-2026-44907?: Yes. react-server-dom-parcel (npm): upgrade to 19.1.9 or later; react-server-dom-turbopack (npm): upgrade to 19.0.8 or later; react-server-dom-webpack (npm): upgrade to 19.0.8 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-44907 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-44907?: Check whether you run react-server-dom-parcel (npm), react-server-dom-turbopack (npm) or react-server-dom-webpack (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

react-server-dom-parcel (npm): upgrade to 19.1.9 or later
```
npm install react-server-dom-parcel@19.1.9
```
react-server-dom-turbopack (npm): upgrade to 19.0.8 or later
```
npm install react-server-dom-turbopack@19.0.8
```
react-server-dom-webpack (npm): upgrade to 19.0.8 or later
```
npm install react-server-dom-webpack@19.0.8
```

Technical details

The vulnerability is classified as Uncontrolled Resource Consumption (CWE-400) and Allocation of Resources Without Limits or Throttling (CWE-770) within the react-server-dom-webpack, react-server-dom-parcel, and react-server-dom-turbopack packages. It occurs when processing specially crafted HTTP requests directed at server function endpoints. An unauthenticated remote attacker can exploit this to trigger out-of-memory (OOM) exceptions or excessive CPU utilization, leading to a denial of service. The issue affects React 19.x branches and has been patched in versions 19.0.8, 19.1.9, and 19.2.8.

Affected products

Meta react-server-dom-webpack 19.0.0-19.0.7, 19.1.0-19.1.8, 19.2.0-19.2.7
Meta react-server-dom-parcel 19.0.0-19.0.7, 19.1.0-19.1.8, 19.2.0-19.2.7
Meta react-server-dom-turbopack 19.0.0-19.0.7, 19.1.0-19.1.8, 19.2.0-19.2.7

Identifiers

CVE-2026-44907
GHSA-wx67-qw84-cm4g

Timeline

2026-07-21: disclosed
2026-07-21: advisory: NVD publication date
2026-07-24: advisory: GitHub Advisory reviewed

References

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