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CVE-2026-71315— Nuxt route rules silently dropped for mixed-case paths, bypassing appMiddleware auth gates (incomplete fix for CVE-2026-53721)

Quick assessment

Affected
nuxt nuxt
Exploitation
Public or AI PoC available; prioritize validation
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 3.21.7至3.21.10之前版本和4.5.1之前版本存在安全漏洞，该漏洞源于对CVE-2026-53721的修复不完整，导致大小写混合的routeRules键在router.options.sensitive为false时无法匹配大小写折叠的查找，可能丢弃appMiddleware授权门，导致授权绕过。

CVSS 8.2 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
nuxt nuxt >= 4.4.7, < 4.5.1 affected
>= 3.21.7, < 3.21.10 affected
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I. Basic Information for CVE-2026-71315

Vulnerability Information
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Vulnerability Title
Nuxt route rules silently dropped for mixed-case paths, bypassing appMiddleware auth gates (incomplete fix for CVE-2026-53721)
Source: CVE Program / CVE List V5
Vulnerability Description
Nuxt is an open-source web development framework for Vue.js. From 3.21.7 until 3.21.10 and 4.5.1, mixed-case routeRules keys can fail to match case-folded lookups when router.options.sensitive is false and drop appMiddleware authorization gates. This is caused by an incomplete fix for CVE-2026-53721. 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:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
大小写敏感处理不恰当
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 3.21.7至3.21.10之前版本和4.5.1之前版本存在安全漏洞，该漏洞源于对CVE-2026-53721的修复不完整，导致大小写混合的routeRules键在router.options.sensitive为false时无法匹配大小写折叠的查找，可能丢弃appMiddleware授权门，导致授权绕过。
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 >= 4.4.7, < 4.5.1 -

II. Public POCs for CVE-2026-71315

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7624 chars
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III. Intelligence Information for CVE-2026-71315

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Patches & Fixes for CVE-2026-71315 (2)

Vendor Advisories for CVE-2026-71315 (1)

Vendor Pages for CVE-2026-71315 (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-2026-71320 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
CVE-2026-71318 4.8 MEDIUM Nuxt: Unauthorized Component Instantiation via Server Island Props

IV. Related Vulnerabilities

Same product: nuxt
Same vendor: nuxt
Same weakness: CWE-178

V. Comments for CVE-2026-71315

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