CVE-2025-67779: additional act vulnerabilities (CVE-2025-55183, CVE-2025-55184, CVE-2025-67779)
## Impact It was found that the fix to address [CVE-2025-55184](https://github.com/facebook/react/security/advisories/GHSA-2m3v-v2m8-q956) in React Server Components was incomplete and does not prevent a denial of service attack in a specific case. We recommend updating immediately. The vulnerability exists in versions 19.0.2, 19.1.3, and 19.2.2 of: - [react-server-dom-webpack](https://www.npmjs.com/package/react-server-dom-webpack) - [react-server-dom-parcel](https://www.npmjs.com/package/react-server-dom-parcel) - [react-server-dom-turbopack](https://www.npmjs.com/package/react-server-dom-turbopack?activeTab=readme) These issues are present in the patches published on December 11th, 2025. ## Patches Fixes were back ported to versions 19.0.3, 19.1.4, and 19.2.3. 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](https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components) for more information and upgrade instructions.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-67779?
CVE-2025-67779 has been classified as a high severity vulnerability due to its potential to cause denial of service attacks.
How do I fix CVE-2025-67779?
To fix CVE-2025-67779, upgrade to the latest version of React Server Components that addresses the vulnerability.
What versions of React Server Components are affected by CVE-2025-67779?
CVE-2025-67779 affects React Server Components versions 19.0.2, 19.1.3, and 19.2.2.
What type of attack does CVE-2025-67779 allow?
CVE-2025-67779 allows for a denial of service attack due to unsafe deserialization of payloads.
Who is the vendor responsible for CVE-2025-67779?
The vendor responsible for CVE-2025-67779 is Meta, which maintains React Server Components.