CVE-2025-55182

CRITICAL CISA KEV EPSS 99.9%
Published Dec 3, 20256mo ago · Modified Jun 17, 20261w ago
10.0 CVSS 3.1
Critical
Find Similar
Published Dec 3, 2025 6mo ago
Last Modified Jun 17, 2026 1w ago
KEV Listed Dec 5, 2025 6mo ago
KEV Due Dec 12, 2025 199d overdue

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.

CVSS Details

Base Score
10.0
Exploitability
3.9
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

CISA Known Exploited Overdue 199d
Added
Dec 5, 2025
Due
Dec 12, 2025

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 Exploit Probability
99.9% percentile
Exploit & Patch Status
Actively Exploited (KEV)
Patch Available

Weaknesses 1

CWE-502 Deserialization of Untrusted Data Validation

Affected Products 82

VendorProductVersionRange
facebookreact19.0.0any
facebookreact19.1.0any
facebookreact19.1.1any
facebookreact19.2.0any
vercelnext.js*≥15.0.0  –  <15.0.5
vercelnext.js*≥15.1.0  –  <15.1.9
vercelnext.js*≥15.2.0  –  <15.2.6
vercelnext.js*≥15.3.0  –  <15.3.6
vercelnext.js*≥15.4.0  –  <15.4.8
vercelnext.js*≥15.5.0  –  <15.5.7
vercelnext.js*≥16.0.0  –  <16.0.7
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js14.3.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js15.6.0any
vercelnext.js16.0.0any

References 6

  • openwall.com http://www.openwall.com/lists/oss-security/2025/12/03/4
    Mailing ListPatchThird Party Advisory
  • aws.amazon.com https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerability-cve-2025-55182/
    Third Party Advisory
  • news.ycombinator.com https://news.ycombinator.com/item?id=46136026
    Issue Tracking
  • react.dev https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components
    PatchVendor Advisory
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55182
    US Government Resource
  • facebook.com https://www.facebook.com/security/advisories/cve-2025-55182
    Vendor Advisory

Remediation

  • openwall.com http://www.openwall.com/lists/oss-security/2025/12/03/4
    Mailing ListPatchThird Party Advisory
  • react.dev https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components
    PatchVendor Advisory