Resource exhaustion in React - CVE-2026-44907
Published: July 22, 2026
Vulnerability identifier: #VU139050
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-44907
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Facebook Inc.
Affected software:
React
React
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in server function endpoints when handling specially crafted HTTP requests. A remote attacker can send specially crafted HTTP requests to cause a denial of service.
Only applications using a server and a framework, bundler, or bundler plugin that supports React Server Components are affected.
How to mitigate CVE-2026-44907
Install security update from vendor's website.