CVE-2026-44579— Next.js: Denial of Service via connection exhaustion in applications using Cache Components
Possible ATT&CK Techniques 2AI
T1499.002 · Service Exhaustion Flood T1499 · Endpoint Denial of ServiceGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-44579
Vulnerability Information
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Vulnerability Title
Next.js: Denial of Service via connection exhaustion in applications using Cache Components
Source: NVD (National Vulnerability Database)
Vulnerability Description
Next.js is a React framework for building full-stack web applications. From to before 15.5.16 and 16.2.5, applications using Partial Prerendering through the Cache Components feature can be vulnerable to connection exhaustion through crafted POST requests to a server action. In affected configurations, a malicious request can trigger a request-body handling deadlock that leaves connections open for an extended period, consuming file descriptors and server capacity until legitimate users are denied service. This vulnerability is fixed in 15.5.16 and 16.2.5.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
Next.js 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Next.js是Vercel开源的一个 React 框架。 Next.js 15.5.16之前版本和16.2.5之前版本存在安全漏洞，该漏洞源于使用Partial Prerendering的Cache Components功能时，特制POST请求到服务器操作可能导致连接耗尽，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-44579
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- https://github.com/vercel/next.js/security/advisories/GHSA-mg66-mrh9-m8jxx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-44579
Same Patch Batch · vercel · 2026-05-13 · 13 CVEs total
| CVE-2026-44578 | 8.6 HIGH | Next.js: Server-side request forgery in applications using WebSocket upgrades |
| CVE-2026-44574 | 8.1 HIGH | Next.js: Middleware / Proxy bypass through dynamic route parameter injection |
| CVE-2026-45109 | 7.5 HIGH | Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes |
| CVE-2026-44575 | 7.5 HIGH | Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes |
| CVE-2026-44573 | 7.5 HIGH | Next.js: Middleware / Proxy bypass in Pages Router applications using i18n |
| CVE-2026-44580 | 6.1 MEDIUM | Next.js: Cross-site scripting in beforeInteractive scripts with untrusted input |
| CVE-2026-44577 | 5.9 MEDIUM | Next.js: Denial of Service in the Image Optimization API |
| CVE-2026-44479 | 5.5 MEDIUM | Vercel: Non-interactive mode includes CLI arguments in suggested command output |
| CVE-2026-44576 | 5.4 MEDIUM | Next.js: Cache poisoning in React Server Component responses |
| CVE-2026-44581 | 4.7 MEDIUM | Next.js: Cross-site scripting in App Router applications using CSP nonces |
| CVE-2026-44572 | 3.7 LOW | Next.js: Middleware / Proxy redirects can be cache-poisoned |
| CVE-2026-44582 | 3.7 LOW | Next.js: Cache poisoning via collisions in React Server Component cache-busting |
IV. Related Vulnerabilities
Same product: next.js
- CVE-2026-45109
Next.js: Middleware / Proxy bypass in App Router application - CVE-2026-44582
Next.js: Cache poisoning via collisions in React Server Comp - CVE-2026-44581
Next.js: Cross-site scripting in App Router applications usi - CVE-2026-44580
Next.js: Cross-site scripting in beforeInteractive scripts w - CVE-2026-44578
Next.js: Server-side request forgery in applications using W
Same vendor: vercel
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vercel ai provider-utils response-handler.ts createJsonError - CVE-2026-8768
vercel ai provider-utils download-blob.ts validateDownloadUr - CVE-2026-8767
vercel ai PR Branch Name Interpolation prettier-on-automerge - CVE-2026-45773
Turborepo: Login callback CSRF/session fixation - CVE-2026-46508
Turborepo: VSCode Extension command injection
Same weakness: CWE-770
- CVE-2026-2325
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WordPress Plugin WPGraphQL 1.3.5 Denial of Service - CVE-2026-44679
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Wasmtime: Panic when allocating a table exceeding the size o - CVE-2026-8468
Unbounded buffer accumulation in multipart header parsing ca
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