CVE-2026-85672 — zerox 1.1.20 contains an OS command injection vulnerability in the file download…¶
Key facts
CVE-2026-85672 is a Critical (9.8) vulnerability: zerox 1.1.20 contains an OS command injection vulnerability in the file download…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-85672 |
| Severity | Critical (9.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-85672/ |
Details¶
English | 한국어
Description¶
zerox 1.1.20 contains an OS command injection vulnerability in the file download mechanism where the temporary file extension derived from document URLs is interpolated unsanitized into shell commands executed by poppler utilities. Attackers can craft document URLs with malicious file extensions containing command substitution syntax to execute arbitrary OS commands before document processing occurs.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-85672 |
| Type | RCE |
| CVSS Score | 9.8 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-85672/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-2026-85672
# 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/getomni-ai/zerox
- https://github.com/getomni-ai/zerox/blob/main/node-zerox/src/utils/file.ts
- https://github.com/getomni-ai/zerox/issues/206
- https://www.vulncheck.com/advisories/zerox-1.1.20-os-command-injection-via-document-url-file-extension
Generated by PoC Generator on 2026-09-05T01:03:51.464303005
Frequently asked questions¶
What is CVE-2026-85672?¶
CVE-2026-85672 is a Critical (9.8) vulnerability: zerox 1.1.20 contains an OS command injection vulnerability in the file download…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-85672?¶
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-2026-85672?¶
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.