CVE-2025-55182 | A pre-authentication remote code execution vulnerability exi… | CVSS 10.0 CRITICAL

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.

Metadata

CVE ID: CVE-2025-55182
State: PUBLISHED
Assigner: Meta
Reserved: 2025-08-08 18:21 UTC
Published: 2025-12-03 15:40 UTC
Last updated: 2026-02-26 16:57 UTC
Vendor / Product: Meta / react-server-dom-webpack
Sources: cve.org · NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: ACTIVE
Automatable: yes
Tech. Impact: total

CISA Known Exploited Vulnerability

Vulnerability name: Meta React Server Components Remote Code Execution Vulnerability
Vendor: Meta
Product: React Server Components
Added to KEV: 2025-12-05
Due date: 2025-12-12
Ransomware: Known use

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.

CISA 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.

Affected products (3)

Vendor	Product	Platform	Versions
Meta	react-server-dom-parcel	—	19.0.0 ≤ 19.0.0, 19.1.0 ≤ 19.1.1, 19.2.0 ≤ 19.2.0
Meta	react-server-dom-turbopack	—	19.0.0 ≤ 19.0.0, 19.1.0 ≤ 19.1.1, 19.2.0 ≤ 19.2.0
Meta	react-server-dom-webpack	—	19.0.0 ≤ 19.0.0, 19.1.0 ≤ 19.1.1, 19.2.0 ≤ 19.2.0

Weakness (CWE)

CWE	Source	Description
—	cna	Deserialization of Untrusted Data (CWE-502)

CVSS scores (1)

Score	Severity	Version	Source	Vector
10.0	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References (2)