CVE-2025-55183
Source Code Exposure Vulnerability in React Server Components
Impact
## Impact There is a source code exposure 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](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 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](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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | react-server-dom-parcel | >= 19.0.0, < 19.0.2 | 19.0.2 |
| npm | react-server-dom-turbopack | >= 19.0.0, < 19.0.2 | 19.0.2 |
| npm | react-server-dom-webpack | >= 19.0.0, < 19.0.2 | 19.0.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vercel | Next.Js | from 15.0.0 before 15.0.7 from 15.1.0 before 15.1.11 from 15.2.0 before 15.2.8 from 15.3.0 before 15.3.8 from 15.4.0 before 15.4.10 from 15.5.0 before 15.5.9 |
| React | from 19.0.0 before 19.0.2 from 19.1.0 before 19.1.3 from 19.2.0 before 19.2.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components
- https://www.facebook.com/security/advisories/cve-2025-55183
- https://github.com/advisories/GHSA-925w-6v3x-g4j4
- https://github.com/facebook/react/security/advisories/GHSA-925w-6v3x-g4j4
- https://nvd.nist.gov/vuln/detail/CVE-2025-55183