CVE-2026-54596 — ITFlow provides an IT documentation, ticketing and accounting system for small managed…¶

Key facts

CVE-2026-54596 is a High (8.1) vulnerability: ITFlow provides an IT documentation, ticketing and accounting system for small managed…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-54596
Severity	High (8.1)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-54596/

Details¶

English | 한국어

Description¶

ITFlow provides an IT documentation, ticketing and accounting system for small managed service providers. Prior to version 26.07, an authenticated Technician or higher with access to at least one client invoice can inject SQL through the frequency parameter handled by agent/post/recurring_invoice.php. The handler passes recurring_invoice_frequency through sanitizeInput but interpolates it unquoted into DATE_ADD, allowing SQL syntax to escape the interval expression, assign additional INSERT columns, store subquery results in recurring_invoice_note, and expose those results through agent/recurring_invoice.php. The persisted recurring_invoice_frequency can execute again when Force Recurring uses it in a later UPDATE, allowing another legitimate user to trigger the second-order injection. This can expose password hashes, SMTP credentials, user records, and database metadata, modify database fields, and enable administrative takeover after credential cracking. This issue is fixed in version 26.07.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-54596
Type	SQLI
CVSS Score	8.1

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-54596/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-2026-54596

# 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/itflow-org/itflow/commit/721142629296ac8e335a79b32fd4d2df721234a8
https://github.com/itflow-org/itflow/pull/1284
https://github.com/itflow-org/itflow/releases/tag/v26.07
https://github.com/itflow-org/itflow/security/advisories/GHSA-f9m3-qjc9-v27j

Generated by PoC Generator on 2026-09-18T12:26:52.093505969

Frequently asked questions¶

What is CVE-2026-54596?¶

CVE-2026-54596 is a High (8.1) vulnerability: ITFlow provides an IT documentation, ticketing and accounting system for small managed…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-54596?¶

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-2026-54596?¶

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.