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CVE-2026-44576— Next.js: Cache poisoning in React Server Component responses

CVSS 5.4 · Medium EPSS 0.01% · P2

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProductVersion RangeStatus
vercelnext.js>= 14.2.0, < 15.5.16affected
>= 16.0.0, < 16.2.5affected
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I. Basic Information for CVE-2026-44576

Vulnerability Information
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Vulnerability Title
Next.js: Cache poisoning in React Server Component responses
Source: NVD (National Vulnerability Database)
Vulnerability Description
Next.js is a React framework for building full-stack web applications. From 14.2.0 to before 15.5.16 and 16.2.5, applications using React Server Components can be vulnerable to cache poisoning when shared caches do not correctly partition response variants. Under affected conditions, an attacker can cause an RSC response to be served from the original URL and poison shared cache entries so later visitors receive component payloads instead of the expected HTML. 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:H/PR:N/UI:N/S:C/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
解释冲突
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 14.2.0至15.5.16之前版本和16.2.5之前版本存在安全漏洞，该漏洞源于使用React Server Components时共享缓存未正确分区响应变体，可能导致缓存投毒，使后续访问者收到组件负载而非预期HTML。
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

VendorProductAffected VersionsCPESubscribe
vercelnext.js >= 14.2.0, < 15.5.16 -

II. Public POCs for CVE-2026-44576

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III. Intelligence Information for CVE-2026-44576

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Same Patch Batch · vercel · 2026-05-13 · 13 CVEs total

CVE-2026-445788.6 HIGHNext.js: Server-side request forgery in applications using WebSocket upgrades
CVE-2026-445748.1 HIGHNext.js: Middleware / Proxy bypass through dynamic route parameter injection
CVE-2026-451097.5 HIGHNext.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes
CVE-2026-445797.5 HIGHNext.js: Denial of Service via connection exhaustion in applications using Cache Component
CVE-2026-445757.5 HIGHNext.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes
CVE-2026-445737.5 HIGHNext.js: Middleware / Proxy bypass in Pages Router applications using i18n
CVE-2026-445806.1 MEDIUMNext.js: Cross-site scripting in beforeInteractive scripts with untrusted input
CVE-2026-445775.9 MEDIUMNext.js: Denial of Service in the Image Optimization API
CVE-2026-444795.5 MEDIUMVercel: Non-interactive mode includes CLI arguments in suggested command output
CVE-2026-445814.7 MEDIUMNext.js: Cross-site scripting in App Router applications using CSP nonces
CVE-2026-445723.7 LOWNext.js: Middleware / Proxy redirects can be cache-poisoned
CVE-2026-445823.7 LOWNext.js: Cache poisoning via collisions in React Server Component cache-busting

IV. Related Vulnerabilities

Same product: next.js
Same vendor: vercel
Same weakness: CWE-436

V. Comments for CVE-2026-44576

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