CVE-2026-105812 — Improper control of code generation in the agent import functionality of Amazon Bedrock…¶

Key facts

CVE-2026-105812 is a Critical (9.0) vulnerability: Improper control of code generation in the agent import functionality of Amazon Bedrock…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-105812
Severity	Critical (9.0)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-105812/

Details¶

English | 한국어

Description¶

Improper control of code generation in the agent import functionality of Amazon Bedrock AgentCore Starter Toolkit before 0.3.14 might allow an authenticated same-account actor to execute arbitrary code when a user imports and runs or deploys a Bedrock Agent, via crafted configuration values incorporated into generated Python source without safe literal encoding.

To remediate this issue, users should upgrade to version 0.3.14. Because this issue persists into generated source, upgrading alone is not sufficient: agents imported with an affected version must be re-imported with version 0.3.14 or later and their local and deployed output artifacts replaced.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-105812
Type	RCE
CVSS Score	9.0

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-105812/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-2026-105812

# 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/2026-127-aws/
https://pypi.org/project/bedrock-agentcore-starter-toolkit/0.3.14/

Generated by PoC Generator on 2026-10-07T22:47:40.834903111

Frequently asked questions¶

What is CVE-2026-105812?¶

CVE-2026-105812 is a Critical (9.0) vulnerability: Improper control of code generation in the agent import functionality of Amazon Bedrock…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-105812?¶

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-2026-105812?¶

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.