Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-71321— Nuxt: Unauthenticated CPU exhaustion parsing and hashing the Nuxt island endpoint body before hash validation

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 3.1.0至3.21.10之前版本和4.0.0至4.5.1之前版本存在资源管理错误漏洞，该漏洞源于内部island渲染器端点对攻击者控制的JSON body输入进行解码和哈希处理，可能导致CPU资源消耗，延迟并发请求。

CVSS 7.5 · High EPSS 0.74% · P53

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
nuxt nuxt >= 4.0.0, < 4.5.1 affected
>= 3.1.0, < 3.21.10 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-71321

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Nuxt: Unauthenticated CPU exhaustion parsing and hashing the Nuxt island endpoint body before hash validation
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, the internal island renderer endpoint `/__nuxt_island/...` decodes and hashes attacker-controlled JSON body input with destr and ohash before validating the URL-resident hash. An unauthenticated `POST /__nuxt_island/_.json` with a large JSON body is fully read, parsed, hashed, and then rejected, which wastes CPU on Nitro single event loop and delays concurrent requests. No valid hash and no authentication are required. 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:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5
Vulnerability Title
Nuxt 资源管理错误漏洞
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之前版本存在资源管理错误漏洞，该漏洞源于内部island渲染器端点对攻击者控制的JSON body输入进行解码和哈希处理，可能导致CPU资源消耗，延迟并发请求。
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-2026-71321

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7155 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-71321

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-71321 (1)

Vendor Pages for CVE-2026-71321 (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-2026-71318 4.8 MEDIUM Nuxt: Unauthorized Component Instantiation via Server Island Props

IV. Related Vulnerabilities

Same product: nuxt
Same vendor: nuxt
Same weakness: CWE-407

V. Comments for CVE-2026-71321

No comments yet

Leave a comment