Denial of Service Vulnerability in Next.js Applications by Vercel
CVE-2025-59471

5.9MEDIUM

Key Information:

Vendor

Vercel
Status
Next
Vendor
CVE Published:
26 January 2026

What is CVE-2025-59471?

A denial of service vulnerability has been identified in self-hosted Next.js applications configured with remotePatterns for the Image Optimizer. The vulnerability arises when the image optimization endpoint (/_next/image) handles external images by loading them entirely into memory without a maximum size restriction. This flaw can be exploited by an attacker who successfully serves a large image from an allowed domain, leading to out-of-memory conditions in the application. To mitigate this risk, it is highly recommended to upgrade to Next.js version 15.5.10 or 16.1.5.

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Affected Version(s)

next 10.0

next 11.0

next 12.0

References

https://github.com/vercel/next.js/security/advisories/GHS...

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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