CVE-2025-55182 — Meta React Server Components Remote Code Execution Vulnerability
CVE-2025-55182: Meta React Server Components Remote Code Execution Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Meta |
| Product | React Server Components |
| Date added | 2025-12-05 |
| Due date | 2025-12-12 |
| Ransomware campaign use | Known |
Description
Meta React Server Components contains a remote code execution vulnerability that could allow unauthenticated remote code execution by exploiting a flaw in how React decodes payloads sent to React Server Function endpoints. Please note CVE-2025-66478 has been rejected, but it is associated with CVE-2025- 55182.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
Check for signs of potential compromise on all internet accessible REACT instances after applying mitigations. For more information, please see: https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components ; https://github.com/vercel-labs/fix-react2shell-next?tab=readme-ov-file ; https://nvd.nist.gov/vuln/detail/CVE-2025-55182
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-55182
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog