CVE-2026-100368 — CliInvoke is a .NET library for invoking command-line programs, and its…¶
Key facts
CVE-2026-100368 is a High (8.4) vulnerability: CliInvoke is a .NET library for invoking command-line programs, and its…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-100368 |
| Severity | High (8.4) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-100368/ |
Details¶
English | 한국어
Description¶
CliInvoke is a .NET library for invoking command-line programs, and its CliInvoke.Specializations packages provide specialized wrappers for shells such as PowerShell and Windows Command Prompt. CliInvoke.Specializations versions 2.2.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4, 3.0.0-alpha.1 through 3.0.0-alpha.4, and 3.0.0-alpha.8 through 3.0.0-alpha.10, as well as AlastairLundy.CliInvoke.Specializations versions 1.0.0-rc.1 through 1.6.1.1, contain an OS command injection vulnerability in their PowerShell and Cmd wrappers. The wrappers pass a caller-controlled target and arguments to pwsh -Command or cmd /c using a single ProcessStartInfo.Arguments string, allowing a double quote in untrusted input to break operating-system-level quoting and cause the shell to execute an additional command with the host process's privileges. The vulnerability is patched in CliInvoke.Specializations versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.1, and in AlastairLundy.CliInvoke.Specializations version 2.0.2. No complete workaround is available; users unable to upgrade should reject or remove double quotes from target paths and arguments, additionally reject shell metacharacters in versions 2.2.0 through 2.9.2 and 3.0.0-alpha.1 through 3.0.0-alpha.4, or bypass the PowerShell and Cmd wrappers and invoke target processes directly when handling untrusted input.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-100368 |
| Type | RCE |
| CVSS Score | 8.4 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-100368/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-2026-100368
# 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/alastairlundy/CliInvoke/security/advisories/GHSA-wrvw-254r-wpmv
Generated by PoC Generator on 2026-09-26T20:00:11.200633611
Frequently asked questions¶
What is CVE-2026-100368?¶
CVE-2026-100368 is a High (8.4) vulnerability: CliInvoke is a .NET library for invoking command-line programs, and its…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-100368?¶
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-2026-100368?¶
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.