CVE-2026-66748 — Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution…¶
Key facts
CVE-2026-66748 is a High (8.8) vulnerability: Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-66748 |
| Severity | High (8.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-66748/ |
Details¶
English | 한국어
Description¶
Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution vulnerability that allows users with custom_fields manage permission to execute arbitrary Ruby code by supplying a malicious expression through the select_eval custom field type. Attackers can store an attacker-controlled Ruby expression in the field options command parameter, which is evaluated via instance_eval within an ERB view whenever a post edit page is rendered, achieving server-side code execution with web server process privileges.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-66748 |
| 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-2026-66748/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-2026-66748
# 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://enrik-m.github.io/posts/Camaleon-CMS-Vulnerabilties/
- https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f
- https://github.com/owen2345/camaleon-cms/pull/1136
- https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2
- https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field
- https://tpaidakis.com/writeups/camaleon-cms-rce-select-eval/
- https://www.vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field
- https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field
Generated by PoC Generator on 2026-08-03T13:27:17.461126062
Frequently asked questions¶
What is CVE-2026-66748?¶
CVE-2026-66748 is a High (8.8) vulnerability: Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-66748?¶
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-2026-66748?¶
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.