CVE-2026-55383 — InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and…¶

Key facts

CVE-2026-55383 is a High (8.2) vulnerability: InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-55383
Severity	High (8.2)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-55383/

Details¶

English | 한국어

Description¶

InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.4.0, InvoiceShelf public customer invoice, estimate, and payment routes use an EmailLog token's numeric mailable_id without verifying mailable_type, and the JSON handlers do not enforce EmailLog::isExpired. A token issued for one document type can therefore disclose a different company's document when numeric identifiers collide, and an expired token can remain usable on the JSON routes GET /customer/invoices/{email_log:token}, GET /customer/estimates/{email_log:token}, and GET /customer/payments/{email_log:token}. View handlers can also mark a mismatched invoice or estimate as viewed and send a notification. This issue is fixed in version 2.4.0.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-55383
Type	RCE
CVSS Score	8.2

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-55383/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-2026-55383

# 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/InvoiceShelf/InvoiceShelf/commit/5839d8385debf379644f55e773639e1c7e673163
https://github.com/InvoiceShelf/InvoiceShelf/pull/662
https://github.com/InvoiceShelf/InvoiceShelf/releases/tag/2.4.0
https://github.com/InvoiceShelf/InvoiceShelf/security/advisories/GHSA-73q7-2953-8gvx
https://github.com/InvoiceShelf/InvoiceShelf/security/advisories/GHSA-73q7-2953-8gvx

Generated by PoC Generator on 2026-10-15T06:50:42.204864349

Frequently asked questions¶

What is CVE-2026-55383?¶

CVE-2026-55383 is a High (8.2) vulnerability: InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-55383?¶

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-2026-55383?¶

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.