CVE-2026-86124 — AutoAgent contains an unauthenticated remote code execution vulnerability in the TCP…¶
Key facts
CVE-2026-86124 is a Critical (9.8) vulnerability: AutoAgent contains an unauthenticated remote code execution vulnerability in the TCP…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-86124 |
| Severity | Critical (9.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-86124/ |
Details¶
English | 한국어
Description¶
AutoAgent contains an unauthenticated remote code execution vulnerability in the TCP server that binds to all interfaces and executes attacker-supplied commands as root. Attackers can connect to the exposed communication port and execute arbitrary bash commands within the container, gaining access to bind-mounted host workspace directories.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-86124 |
| 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-2026-86124/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-2026-86124
# 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/HKUDS/AutoAgent
- https://github.com/HKUDS/AutoAgent/blob/16c12b052ef2330a198063c62a07a7f9723031e3/autoagent/environment/docker_env.py
- https://github.com/HKUDS/AutoAgent/blob/16c12b052ef2330a198063c62a07a7f9723031e3/autoagent/environment/tcp_server.py
- https://github.com/HKUDS/AutoAgent/issues/96
- https://www.vulncheck.com/advisories/autoagent-unauthenticated-remote-code-execution-via-the-sandbox-tcp-command-server
Generated by PoC Generator on 2026-09-05T20:44:53.037213257
Frequently asked questions¶
What is CVE-2026-86124?¶
CVE-2026-86124 is a Critical (9.8) vulnerability: AutoAgent contains an unauthenticated remote code execution vulnerability in the TCP…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-86124?¶
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-2026-86124?¶
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.