CVE-2026-85012 — Improper neutralization of special elements used in an OS command (CWE-78) in the…¶
Key facts
CVE-2026-85012 is a High (8.0) vulnerability: Improper neutralization of special elements used in an OS command (CWE-78) in the…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-85012 |
| Severity | High (8.0) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-85012/ |
Details¶
English | 한국어
Description¶
Improper neutralization of special elements used in an OS command (CWE-78) in the blueprint resynthesis framework in Amazon Web Services codecatalyst-blueprints before 0.3.156 might allow a user with permission to commit to a repository in the project to execute arbitrary commands in the blueprint resynthesis environment via shell metacharacters in the owner field of a [local] merge strategy entry in a crafted .ownership-file.
Version 0.3.156 removes shell interpretation of the owner field, running the command directly rather than through a shell, and rejects values outside an allowlisted command form. This eliminates shell metacharacter command injection. To remediate this issue, users should upgrade to version 0.3.156 or later.
No action is required for use of the Amazon CodeCatalyst service. Resynthesis runs in an isolated per-project environment with scoped credentials, and the service applies server-side validation there that rejects [local] merge strategy commands outside a restricted allowlisted form, including for blueprint versions published before 0.3.156.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-85012 |
| Type | RCE |
| CVSS Score | 8.0 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-85012/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-2026-85012
# 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://aws.amazon.com/security/security-bulletins/2026-095-aws/
- https://github.com/aws/codecatalyst-blueprints/security/advisories/GHSA-c7rj-fr2j-64w7
- https://www.npmjs.com/package/@amazon-codecatalyst/blueprints.blueprint/v/0.3.156
Generated by PoC Generator on 2026-09-04T03:45:58.320812528
Frequently asked questions¶
What is CVE-2026-85012?¶
CVE-2026-85012 is a High (8.0) vulnerability: Improper neutralization of special elements used in an OS command (CWE-78) in the…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-85012?¶
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-2026-85012?¶
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.