CVE-2026-12405 — A flaw was found in rubygem-foreman_remote_execution.¶
Key facts
CVE-2026-12405 is a High (8.8) vulnerability: A flaw was found in rubygem-foreman_remote_execution.. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-12405 |
| Severity | High (8.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-12405/ |
Details¶
English | 한국어
Description¶
A flaw was found in rubygem-foreman_remote_execution. A command injection vulnerability exists in the Red Hat Satellite API (/api/v2/job_invocations). When a job template has the effective_user property marked as overridable: true, the application fails to properly sanitize the effective_user input provided during the API request. The exploitation does not rely on the content or logic of the Job Template/playbook itself; rather, the injection occurs during the instantiation of the job execution environment by the Satellite server. An attacker with permissions to execute job templates can inject arbitrary shell commands into this parameter, which are executed on the target infrastructure with the privileges of the execution user.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-12405 |
| Type | RCE |
| CVSS Score | 8.8 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-12405/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-2026-12405
# 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://access.redhat.com/errata/RHSA-2026:74503
- https://access.redhat.com/errata/RHSA-2026:74504
- https://access.redhat.com/errata/RHSA-2026:74505
- https://access.redhat.com/errata/RHSA-2026:74506
- https://access.redhat.com/security/cve/CVE-2026-12405
- https://bugzilla.redhat.com/show_bug.cgi?id=2488952
Generated by PoC Generator on 2026-10-03T23:02:48.410139295
Frequently asked questions¶
What is CVE-2026-12405?¶
CVE-2026-12405 is a High (8.8) vulnerability: A flaw was found in rubygem-foreman_remote_execution.. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-12405?¶
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-2026-12405?¶
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.