Allocation of Resources Without Limits or Throttling in React - CVE-2026-23870
Published: May 6, 2026
Vulnerability identifier: #VU130269
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-23870
CWE-ID: CWE-770
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 server function endpoints when handling specially crafted HTTP requests. A remote attacker can send specially crafted HTTP requests to cause a denial of service.
This can lead to out-of-memory exceptions or excessive CPU usage.
Affected software
React
Next.js
Next.js
How to mitigate CVE-2026-23870
Install security update from vendor's website.
React - addressed in versions 19.0.6, 19.1.7, 19.2.6
Next.js - addressed in versions 15.5.16, 16.2.5
Next.js - addressed in versions 15.5.16, 16.2.5