Resource exhaustion in Vercel Next
CVE-2025-59471
A denial of service vulnerability exists in self-hosted Next.js applications that have `remotePatterns` configured for the Image Optimizer. The image optimization endpoint (`/_next/image`) loads external images entirely into memory without enforcing a maximum size limit, allowing an attacker to cause out-of-memory conditions by requesting optimization of arbitrarily large images. This vulnerability requires that `remotePatterns` is configured to allow image optimization from external domains and that the attacker can serve or control a large image on an allowed domain. Strongly consider upgrading to 15.5.10 or 16.1.5 to reduce risk and prevent availability issues in Next applications.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (40.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Vercel Next — versions 10.0, 11.0, 12.0
- Vercel Next.js
Weakness classification (CWE)
References
- github.com/vercel/next.js/security/advisories/GHSA-9g9p-9gw9-jx7f (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-59471?
- CVE-2025-59471 is a medium-severity vulnerability in Vercel Next, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2026-01-26.
- How severe is CVE-2025-59471?
- Medium severity. CVSS v3 base score is 5.9 out of 10.