CVE-2025-55182
Meta React Server Components Remote Code Execution Vulnerability
IN CISA KEV
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.
- Vendor
- Meta
- Product
- React Server Components
- CVSS 3.1
- 10 (critical), scored by cve-assign@fb.comCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CWE
- CWE-502
- Published
- 2025-12-03
- NVD modified
- 2026-10-08
- NVD status
- Analyzed
CISA KEV
- Date added
- 2025-12-05
- Due date
- 2025-12-12
- Ransomware use
- Known
- 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.
EPSS
100% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- react.dev (Patch, Vendor Advisory)
- www.facebook.com (Vendor Advisory)
- www.openwall.com (Mailing List, Patch, Third Party Advisory)
- news.ycombinator.com (Issue Tracking)
- aws.amazon.com (Third Party Advisory)
- www.cisa.gov (US Government Resource)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.