CVE-2025-55182
A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 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.
- CVSS 3.1
- 10.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - EPSS
- 100% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-25)
- CISA KEV
- listed 2025-12-05, due 2025-12-12, known ransomware use
- CWE
- CWE-502
- Published
- Modified
- Record from
- the NVD, synced
Affected
- facebook:react
- vercel:next.js
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-fv66-9v8q-g76r | npm | react-server-dom-webpack | >=19.0.0 <19.0.1 | 19.0.1 |
| GHSA-fv66-9v8q-g76r | npm | react-server-dom-webpack | >=19.1.0 <19.1.2 | 19.1.2 |
| GHSA-fv66-9v8q-g76r | npm | react-server-dom-webpack | >=19.2.0 <19.2.1 | 19.2.1 |
| GHSA-fv66-9v8q-g76r | npm | react-server-dom-turbopack | >=19.0.0 <19.0.1 | 19.0.1 |
| GHSA-fv66-9v8q-g76r | npm | react-server-dom-turbopack | >=19.1.0 <19.1.2 | 19.1.2 |
| GHSA-fv66-9v8q-g76r | npm | react-server-dom-turbopack | >=19.2.0 <19.2.1 | 19.2.1 |
| GHSA-fv66-9v8q-g76r | npm | react-server-dom-parcel | >=19.0.0 <19.0.1 | 19.0.1 |
| GHSA-fv66-9v8q-g76r | npm | react-server-dom-parcel | >=19.1.0 <19.1.2 | 19.1.2 |
| GHSA-fv66-9v8q-g76r | npm | react-server-dom-parcel | >=19.2.0 <19.2.1 | 19.2.1 |
References
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components
- https://www.facebook.com/security/advisories/cve-2025-55182
- http://www.openwall.com/lists/oss-security/2025/12/03/4
- https://news.ycombinator.com/item?id=46136026
- https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerability-cve-2025-55182/