CVE-2026-57206 — SimpleChat is a secure AI conversation application with personal and group workspaces for…¶
Key facts
CVE-2026-57206 is a High (8.6) vulnerability: SimpleChat is a secure AI conversation application with personal and group workspaces for…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-57206 |
| Severity | High (8.6) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-57206/ |
Details¶
English | 한국어
Description¶
SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.241.206, several plugin validation routes in application/single_app/plugin_validation_endpoint.py, including POST /api/admin/plugins/test-instantiation, GET /api/admin/plugins/health-check/<plugin_name>, POST /api/admin/plugins/repair/<plugin_name>, and POST /api/plugins/validate, relied on @swagger_route(security=get_auth_security()) documentation without enforcing @login_required, @user_required, or @admin_required at runtime, allowing unauthenticated or unauthorized clients to invoke plugin validation, health, and repair behavior. This issue is fixed in version 0.241.206.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-57206 |
| CVSS Score | 8.6 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-57206/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-2026-57206
# 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/microsoft/simplechat/blob/main/docs/explanation/fixes/PLUGIN_VALIDATION_ROUTE_AUTH_FIX.md
- https://github.com/microsoft/simplechat/releases/tag/v0.250.001
- https://github.com/microsoft/simplechat/security/advisories/GHSA-g6gr-xp46-hrmj
Generated by PoC Generator on 2026-07-17T03:56:06.149069504
Frequently asked questions¶
What is CVE-2026-57206?¶
CVE-2026-57206 is a High (8.6) vulnerability: SimpleChat is a secure AI conversation application with personal and group workspaces for…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-57206?¶
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-2026-57206?¶
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.