CVE-2026-44574— Next.js: Middleware / Proxy bypass through dynamic route parameter injection
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-44574
Vulnerability Information
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Vulnerability Title
Next.js: Middleware / Proxy bypass through dynamic route parameter injection
Source: NVD (National Vulnerability Database)
Vulnerability Description
Next.js is a React framework for building full-stack web applications. From 15.4.0 to before 15.5.16 and 16.2.5, applications that rely on middleware to protect dynamic routes can be vulnerable to authorization bypass. In affected deployments, specially crafted query parameters can alter the dynamic route value seen by the page while leaving the visible path unchanged, which can allow protected content to be rendered without passing the expected middleware check. 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:L/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用候选路径或通道进行的认证绕过
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 15.4.0至15.5.16之前版本和16.2.5之前版本存在安全漏洞，该漏洞源于依赖中间件保护动态路由时，特制查询参数可改变页面看到的动态路由值而保持可见路径不变，可能导致绕过授权检查访问受保护内容。
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-2026-44574
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- https://github.com/vercel/next.js/security/advisories/GHSA-492v-c6pp-mqqvx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-44574
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-2026-45109 | 7.5 HIGH | Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes |
| CVE-2026-44579 | 7.5 HIGH | Next.js: Denial of Service via connection exhaustion in applications using Cache Component |
| 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-2026-44579
Next.js: Denial of Service via connection exhaustion in appl
Same vendor: vercel
- CVE-2026-8769
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-288
- CVE-2026-4320
Authorization Bypass in ICMS Content Management by Creartia - CVE-2026-4524
Authentication Bypass Using an Alternate Path or Channel in - CVE-2026-45109
Next.js: Middleware / Proxy bypass in App Router application - CVE-2026-44575
Next.js: Middleware / Proxy bypass in App Router application - CVE-2026-40621
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