Is CVE-2025-67779 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-67779 being exploited in the wild.

How severe is CVE-2025-67779?

High severity, with a CVSS score of 7.5, published 12 December 2025.

Which products and versions are affected?

react-server-dom-parcel (npm) SEMVER:introduced=19.0.2,fixed=19.0.3; react-server-dom-turbopack (npm) SEMVER:introduced=19.0.2,fixed=19.0.3; react-server-dom-webpack (npm) SEMVER:introduced=19.0.2,fixed=19.0.3.

Is there a fix for CVE-2025-67779?

Yes. react-server-dom-parcel (npm): upgrade to 19.0.3 or later; react-server-dom-turbopack (npm): upgrade to 19.0.3 or later; react-server-dom-webpack (npm): upgrade to 19.0.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2025-67779 attacked?

It is attacked over the network.

Am I affected by CVE-2025-67779?

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-2025-67779: It was found that the fix addressing in React Server Components was incomplete and does not prevent a denial of service attac

CVE-2025-67779 · Severity: high · CVSS 7.5 · Published 2025-12-12

React Server Components are JavaScript libraries used by web applications to render components on the server. An incomplete security patch allows attackers to send specially crafted requests that crash the server, causing service outages. Applications using React Server Components bundled with Webpack, Parcel, or Turbopack are affected.

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

Quick answers

Is CVE-2025-67779 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-67779 being exploited in the wild.
How severe is CVE-2025-67779?: High severity, with a CVSS score of 7.5, published 12 December 2025.
Which products and versions are affected?: react-server-dom-parcel (npm) SEMVER:introduced=19.0.2,fixed=19.0.3; react-server-dom-turbopack (npm) SEMVER:introduced=19.0.2,fixed=19.0.3; react-server-dom-webpack (npm) SEMVER:introduced=19.0.2,fixed=19.0.3.
Is there a fix for CVE-2025-67779?: Yes. react-server-dom-parcel (npm): upgrade to 19.0.3 or later; react-server-dom-turbopack (npm): upgrade to 19.0.3 or later; react-server-dom-webpack (npm): upgrade to 19.0.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-67779 attacked?: It is attacked over the network.
Am I affected by CVE-2025-67779?: 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 19.0.3 or later
```
npm install react-server-dom-parcel@19.0.3
```
react-server-dom-turbopack (npm): upgrade to 19.0.3 or later
```
npm install react-server-dom-turbopack@19.0.3
```
react-server-dom-webpack (npm): upgrade to 19.0.3 or later
```
npm install react-server-dom-webpack@19.0.3
```

Technical details

The vulnerability is a denial of service flaw stemming from improper handling of deserialization and uncontrolled resource consumption (CWE-400, CWE-502). A prior fix for CVE-2025-55184 was incomplete, leaving specific attack vectors unmitigated. The flaw is reachable over the network without authentication or user interaction, allowing remote attackers to trigger server resource exhaustion or crashes. Patches are available in versions 19.0.3, 19.1.4, and 19.2.3 of affected libraries, and immediate upgrade is recommended.

Affected products

Meta react-server-dom-webpack 19.0.2, 19.1.3, 19.2.2
Meta react-server-dom-parcel 19.0.2, 19.1.3, 19.2.2
Meta react-server-dom-turbopack 19.0.2, 19.1.3, 19.2.2

Identifiers

CVE-2025-67779
GHSA-7gmr-mq3h-m5h9

Timeline

2025-12-12: disclosed: GHSA-7gmr-mq3h-m5h9 published; incomplete patch vulnerability disclosed
2025-12-12: patched: Fixes backported to 19.0.3, 19.1.4, 19.2.3

References

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