December 5, 2025 · Applied Cybernetics Group
CVE-2025-55182 — Meta React Server Components
known ransomware use
Meta React Server Components Remote Code Execution Vulnerability
- Added to KEV
2025-12-05- Federal due date
2025-12-12- Vendor
- Meta
- Product
- React Server Components
- EPSS
- 99.9th percentile (score 0.996, as of
2026-07-13) - NVD CVSS v3.1
- 10 (CRITICAL)
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2025-55182
CISA short 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
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
NVD description
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.