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CVE-2026-64644— Next.js: Denial of Service in the Image Optimization API using SVGs

Quick assessment

Affected
vercel next.js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Next.js 是一个用于构建全栈 Web 应用的 React 框架。在 15.5.0 至 15.5.20 以及 16.0.0 至 16.2.10 版本中，当使用默认图像加载器自行托管 Next.js 时，若配置了远程图像优化功能（默认情况下未启用），Image Optimization API 可能会优化远程托管的图像。如果这些远程图像包含恶意内容，可能导致 端点出现 CPU 资源耗尽的问题。 受影响的仅是 配置项及其数组中定义的模式；而 、 以及 Vercel 平台则不受此问题影响。该问题已在版本 15.5.2

CVSS 6.3 · Medium EPSS 0.67% · P52

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
vercel next.js >= 15.5.0, < 15.5.21 affected
>= 16.0.0, < 16.2.11 affected
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I. Basic Information for CVE-2026-64644

Vulnerability Information
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Vulnerability Title
Next.js: Denial of Service in the Image Optimization API using SVGs
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vercel next.js >= 15.5.0, < 15.5.21 -

II. Public POCs for CVE-2026-64644

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III. Intelligence Information for CVE-2026-64644

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Patches & Fixes for CVE-2026-64644 (2)

Vendor Advisories for CVE-2026-64644 (1)

Vendor Pages for CVE-2026-64644 (1)

Same Patch Batch · vercel · 2026-07-27 · 9 CVEs total

CVE-2026-64642 8.3 HIGH Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single l
CVE-2026-64645 8.3 HIGH Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostn
CVE-2026-64649 8.3 HIGH Next.js: Server-Side Request Forgery in Server Actions on Custom Servers
CVE-2026-64641 8.2 HIGH Next.js: Denial of Service in App Router using Server Actions
CVE-2026-64643 6.3 MEDIUM Next.js: Unauthenticated Disclosure of Internal Server Function endpoints
CVE-2026-64646 6.3 MEDIUM Next.js: Unbounded Server Action payload in Edge runtime
CVE-2026-64647 6.3 MEDIUM Next.js: Response Body Cache Confusion with Invalid UTF-8 Request Bodies
CVE-2026-64648 6.0 MEDIUM Next.js: Response Body Cache Confusion for Requests Containing Bodies

IV. Related Vulnerabilities

Same product: next.js
Same vendor: vercel
Same weakness: CWE-407