CVE-2026-71319 — Nuxt is an open-source web development framework for Vue.js.¶

Key facts

CVE-2026-71319 is a Critical (9.6) vulnerability: Nuxt is an open-source web development framework for Vue.js.. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-71319
Severity	Critical (9.6)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-71319/

Details¶

English | 한국어

Description¶

Nuxt is an open-source web development framework for Vue.js. Prior to 3.3.1, Nuxt DevTools (development mode only) exposes a bidirectional RPC channel over the Vite HMR WebSocket via the nuxt:devtools:rpc plugin. On affected versions the channel has no authentication: any client that can reach the Vite HMR endpoint (ws://:/, subprotocol vite-hmr) can call RPC methods, with no token, handshake, or origin check before the channel is established. The updateOptions(), clearOptions(), and openInEditor() methods do not enforce the ensureDevAuthToken check that the other mutating methods use. openInEditor() reads the persisted behavior.openInEditor value and passes it to the launch-editor package, which spawns it as a child process. That value is settable through the equally unauthenticated updateOptions(). An attacker who can reach the HMR port can therefore chain updateOptions('behavior', { openInEditor: '' }) then openInEditor('') to execute an arbitrary program on the developer's machine. This issue is fixed in 3.3.1.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-71319
Type	RCE
CVSS Score	9.6

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-71319/poc.py

Usage¶

# Run PoC against target
python3 poc.py --target <TARGET_URL>

# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>

⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.

Test Lab¶

This repository includes a Docker-based test environment with both vulnerable and patched applications.

Quick Start¶

# Clone and navigate to CVE directory
cd CVE-2026-71319

# Start both applications
docker-compose up -d

# Run tests
./run-tests.sh    # Linux/Mac
./run-tests.ps1   # Windows PowerShell

Application Endpoints¶

Application	URL	Status
Vulnerable App	http://localhost:8080	Shows vulnerability
Patched App	http://localhost:8081	Demonstrates fix

Directory Structure¶

├── README.md           # English documentation
├── README_KO.md        # Korean documentation
├── poc.py              # PoC detection script
├── docker-compose.yml  # Container orchestration
├── run-tests.sh        # Linux/Mac test runner
├── run-tests.ps1       # Windows test runner
├── vulnerable-app/     # Vulnerable version
│   ├── app.py
│   ├── Dockerfile
│   └── requirements.txt
└── patched-app/        # Fixed version
    ├── app.py
    ├── Dockerfile
    └── requirements.txt

References¶

https://github.com/nuxt/devtools/commit/a7b2718b930766e1ffb0640259d53f5b041a50b4
https://github.com/nuxt/devtools/releases/tag/v3.3.1
https://github.com/nuxt/nuxt/security/advisories/GHSA-279x-mwfv-vcqv

Generated by PoC Generator on 2026-08-09T01:04:38.612108069

Frequently asked questions¶

What is CVE-2026-71319?¶

CVE-2026-71319 is a Critical (9.6) vulnerability: Nuxt is an open-source web development framework for Vue.js.. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-71319?¶

Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.

How do I block or mitigate CVE-2026-71319?¶

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

For authorized security testing and research only. See the full source and NVD record.