Next.js is a React framework for building full-stack web applications. In versions 15.5.0 through 15.5.20 and 16.0.0 through 16.2.10, when self-hosting Next.js with the default image loader, the Image Optimization API can optimize remotely hosted images if configured (not enabled by default). If those images contain malicious content, they can cause CPU exhaustion in /_next/image endpoints.Only config.images.remotePatterns is affected, and just the patterns in that array, whereas config.images.unoptimized: true, config.images.loader: 'custom', and Vercel are not impacted. This issue has been fixed in versions 15.5.21 and 16.2.11.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Next.js is a React framework for building full-stack web applications. In versions 15.5.0 through 15.5.20
    and 16.0.0 through 16.2.10, when self-hosting Next.js with the default image loader, the Image
    Optimization API can optimize remotely hosted images if configured (not enabled by default). If those
    images contain malicious content, they can cause CPU exhaustion in /_next/image endpoints.Only
    config.images.remotePatterns is affected, and just the patterns in that array, whereas
    config.images.unoptimized: true, config.images.loader: 'custom', and Vercel are not impacted. This issue
    has been fixed in versions 15.5.21 and 16.2.11. (CVE-2026-64644)

The Next.js Framework on the remote host is affected by a denial of service vulnerability:

  - When self-hosting Next.js with the default image loader, the Image Optimization API can optimize remotely     hosted images if configured (not enabled by default). If those images contain malicious content, they can     cause CPU exhaustion in /_next/image endpoints. Only config.images.remotePatterns is affected, and just     the patterns in that array, whereas config.images.unoptimized: true, config.images.loader: 'custom', and     Vercel are not impacted. (CVE-2026-64644)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
465780	Echo: next: security update to 15.5.21	Tenable Cloud Security	Echo Local Security Checks	Local	medium
465780	Echo: next: security update to 15.5.21	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
342580	Next.js Framework 15.5.x < 15.5.21 / 16.x < 16.2.11 Image Optimization API DoS (GHSA-q8wf-6r8g-63ch)	Nessus	Misc.	Local	medium
445137	SCA: security update for next (GHSA-q8wf-6r8g-63ch)	Tenable Cloud Security	SCA Checks	Local	medium
445137	SCA: security update for next (GHSA-q8wf-6r8g-63ch)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-64644

medium

Tenable Plugins

medium

medium

medium

medium

medium