Resource exhaustion in Next.js - #VU155802
Published: October 15, 2026
Vulnerability identifier: #VU155802
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 CPU resource consumption in the Next.js App Router when processing requests. A remote attacker can send specially crafted requests to cause a denial of service.
Exploitation requires the application to have at least one Server Action. Applications using Pages Router are not affected.
Affected software
Next.js
Remediation
Install security update from vendor's website.
Next.js - addressed in versions 15.5.28, 16.4.1