CVE-2026-55239 — Tianji is an open source analytics, uptime monitoring, and server status platform.¶

Key facts

CVE-2026-55239 is a High (8.8) vulnerability: Tianji is an open source analytics, uptime monitoring, and server status platform.. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-55239
Severity	High (8.8)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-55239/

Details¶

English | 한국어

Description¶

Tianji is an open source analytics, uptime monitoring, and server status platform. Prior to 1.31.29, the getDateQuery() function in src/server/utils/prisma.ts constructs raw SQL through Prisma.sql() by interpolating the timezone request value without parameter binding. The timezone value can reach affected analytics queries through request data or the timezone HTTP header, and workspaceProcedure permits any authenticated workspace member, including a read-only viewer, to reach those queries. An attacker can execute arbitrary SQL against the shared PostgreSQL database, which can disclose or modify credentials, API keys, and tenant data or make the service unavailable. This issue is fixed in version 1.31.29.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-55239
Type	SQLI
CVSS Score	8.8

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-55239/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-2026-55239

# 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/msgbyte/tianji/commit/132ff67907df897d222829ea8ad1a018ff74df48
https://github.com/msgbyte/tianji/releases/tag/v1.31.29
https://github.com/msgbyte/tianji/security/advisories/GHSA-v9jm-vvrj-53c4

Generated by PoC Generator on 2026-10-16T07:04:06.157129448

Frequently asked questions¶

What is CVE-2026-55239?¶

CVE-2026-55239 is a High (8.8) vulnerability: Tianji is an open source analytics, uptime monitoring, and server status platform.. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-55239?¶

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-2026-55239?¶

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.