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CVE-2026-71318— Nuxt: Unauthorized Component Instantiation via Server Island Props

Quick assessment

Affected
nuxt nuxt
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.

Nuxt是Nuxt组织开源的一个构建服务端渲染应用的开发框架。 Nuxt 3.1.0至3.21.10之前版本和4.0.0至4.5.1之前版本存在输入验证错误漏洞，该漏洞源于输入验证错误，攻击者可以向/__nuxt_island/端点提供顶层 属性，并通过<component :is>、resolveDynamicComponent或h()驱动动态组件解析。

CVSS 4.8 · Medium EPSS 0.32% · P22

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
nuxt nuxt >= 4.0.0, < 4.5.1 affected
>= 3.1.0, < 3.21.10 affected
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I. Basic Information for CVE-2026-71318

Vulnerability Information
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Vulnerability Title
Nuxt: Unauthorized Component Instantiation via Server Island Props
Source: CVE Program / CVE List V5
Vulnerability Description
Nuxt is an open-source web development framework for Vue.js. From 3.1.0 until 3.21.10 and 4.5.1, an attacker can supply a top-level `as` prop to the /__nuxt_island/ endpoint and drive dynamic component resolution through <component :is>, resolveDynamicComponent, or h(). This issue is fixed in 3.21.10 and 4.5.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nuxt 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nuxt是Nuxt组织开源的一个构建服务端渲染应用的开发框架。 Nuxt 3.1.0至3.21.10之前版本和4.0.0至4.5.1之前版本存在输入验证错误漏洞，该漏洞源于输入验证错误，攻击者可以向/__nuxt_island/端点提供顶层`as`属性，并通过<component :is>、resolveDynamicComponent或h()驱动动态组件解析。
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

Vendor Product Affected Versions CPE Subscribe
nuxt nuxt >= 4.0.0, < 4.5.1 -

II. Public POCs for CVE-2026-71318

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III. Intelligence Information for CVE-2026-71318

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Vendor Advisories for CVE-2026-71318 (1)

Vendor Pages for CVE-2026-71318 (2)

Same Patch Batch · nuxt · 2026-08-05 · 7 CVEs total

CVE-2026-71319 9.6 CRITICAL Nuxt.js Unauthenticated WebSocket RPC Call Leading to Remote Code Execution
CVE-2026-71315 8.2 HIGH Nuxt route rules silently dropped for mixed-case paths, bypassing appMiddleware auth gates
CVE-2026-71320 8.1 HIGH Nuxt: Server-Side Remote Code Execution via Runtime Template Injection in Nuxt Server Isla
CVE-2026-71314 7.5 HIGH Nuxt: Unauthenticated out-of-memory crash via unbounded v-for expansion in island renderin
CVE-2026-71316 7.5 HIGH Nuxt runtime payload cache discloses another user's SSR data across users and to unauthent
CVE-2026-71321 7.5 HIGH Nuxt: Unauthenticated CPU exhaustion parsing and hashing the Nuxt island endpoint body bef

IV. Related Vulnerabilities

Same product: nuxt
Same vendor: nuxt
Same weakness: CWE-20

V. Comments for CVE-2026-71318

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