Resource exhaustion in Next.js - CVE-2025-59471
Published: January 26, 2026
Vulnerability identifier: #VU122049
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-2025-59471
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources in Image Optimizer. A remote attacker can pass overly large images via the "/_next/image" API endpoint, trigger resource exhaustion and perform a denial of service (DoS) attack.
Affected software
Next.js
How to mitigate CVE-2025-59471
Install updates from vendor's website.
Next.js - addressed in versions 15.5.10, 16.1.5