CVE-2026-71242 — Crater's NotePolicy checks only a blanket Bouncer ability (manage-all-notes /…¶

Key facts

CVE-2026-71242 is a High (8.3) vulnerability: Crater's NotePolicy checks only a blanket Bouncer ability (manage-all-notes /…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-71242
Severity	High (8.3)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-71242/

Details¶

English | 한국어

Description¶

Crater's NotePolicy checks only a blanket Bouncer ability (manage-all-notes / view-all-notes) with no company-ownership comparison, unlike InvoicePolicy and other sibling policies which additionally verify $user->hasCompany($model->company_id). NotesController's show(), update(), and destroy() actions authorize via $this->authorize('view notes'/'manage notes') without passing the target Note model, and Note's company-scoping (scopeWhereCompany) is applied only in the list endpoint, not in show/update/destroy. Any authenticated user of one company can read, edit, or delete another company's notes by ID. This is a distinct finding from the previously reported CustomerPolicy company-ownership omission (a different policy class and controller).

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-71242
Type	IDOR
CVSS Score	8.3

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-71242/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-2026-71242

# 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/crater-invoice/crater

Generated by PoC Generator on 2026-08-10T00:25:16.397613421

Frequently asked questions¶

What is CVE-2026-71242?¶

CVE-2026-71242 is a High (8.3) vulnerability: Crater's NotePolicy checks only a blanket Bouncer ability (manage-all-notes /…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-71242?¶

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-2026-71242?¶

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.