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CVE-2025-55182

Meta React Server Components Remote Code Execution Vulnerability

  • Critical 10.0
  • Exploited: added to CISA KEV 5 Dec 2025
  • Used in ransomware campaigns

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.

Key facts

Published
3 Dec 2025
Last changed
7 Oct 2026
Assigned by
Meta
KEV added
5 Dec 2025
KEV fix due
12 Dec 2025
Used in ransomware
Yes, according to CISA
EPSS
99.731% likely to be exploited in the next 30 days, higher than 99.953% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 10.0CVSS 3.1, Criticalfrom the CNA (Meta)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What to do

  • Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
Metareact-server-dom-webpack
  • Default status: unaffected
  • 19.0.0 up to and including 19.0.0 (affected)
  • 19.1.0 up to and including 19.1.1 (affected)
  • 19.2.0 up to and including 19.2.0 (affected)
Metareact-server-dom-turbopack
  • Default status: unaffected
  • 19.0.0 up to and including 19.0.0 (affected)
  • 19.1.0 up to and including 19.1.1 (affected)
  • 19.2.0 up to and including 19.2.0 (affected)
Metareact-server-dom-parcel
  • Default status: unaffected
  • 19.0.0 up to and including 19.0.0 (affected)
  • 19.1.0 up to and including 19.1.1 (affected)
  • 19.2.0 up to and including 19.2.0 (affected)

Timeline

  1. 3 Dec 2025 Published
  2. 5 Dec 2025 Added to the CISA KEV catalogue

Weakness

References