#VU119103 Deserialization of untrusted data in React - CVE-2025-55182
Published: December 3, 2025 / Updated: April 1, 2026
Vulnerability identifier: #VU119103
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
CVE-ID: CVE-2025-55182
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
React
React
Software vendor:
Facebook Inc.
Facebook Inc.
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data passed to React Server Function endpoints. A remote non-authenticated attacker can send a specially crafted HTTP request to the React server components and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.