CVE-2025-55184: additional act vulnerabilities (CVE-2025-55183, CVE-2025-55184, CVE-2025-67779)
Impact
There is a denial of service vulnerability in React Server Components.
React recommends updating immediately.
The vulnerability exists in versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1 of:
- react-server-dom-webpack - react-server-dom-parcel - react-server-dom-turbopack
These issues are present in the patches published last week.
Patches
Fixes were back ported to versions 19.0.2, 19.1.3, and 19.2.2.
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.
Other sources
A pre-authentication denial of service vulnerability exists in React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints, which can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-55184?
CVE-2025-55184 is classified as a denial of service vulnerability that can disrupt application availability.
How do I fix CVE-2025-55184?
To fix CVE-2025-55184, upgrade to the latest version of React Server Components that is not affected by the vulnerability.
Which versions of React are affected by CVE-2025-55184?
CVE-2025-55184 affects React Server Components versions 19.0.0 to 19.2.1.
What components are impacted by CVE-2025-55184?
CVE-2025-55184 impacts the packages react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack.
What type of vulnerability is CVE-2025-55184?
CVE-2025-55184 is a pre-authentication denial of service vulnerability.