Resource exhaustion in React - #VU155927
Published: October 15, 2026
Vulnerability identifier: #VU155927
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in React server function endpoints when handling HTTP requests. A remote attacker can send specially crafted HTTP requests to trigger out-of-memory exceptions or excessive CPU usage to cause a denial of service.
Affected applications must use a server and a framework, bundler, or bundler plugin that supports React Server Components.
Affected software
React
Remediation
Install security update from vendor's website.
React - addressed in versions 19.0.9, 19.1.10, 19.2.9, 19.3.1