CVE-2026-18141 — A flaw was found in aap-gateway, a component of Ansible Automation Platform's…¶

Key facts

CVE-2026-18141 is a High (8.2) vulnerability: A flaw was found in aap-gateway, a component of Ansible Automation Platform's…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-18141
Severity	High (8.2)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-18141/

Details¶

English | 한국어

Description¶

A flaw was found in aap-gateway, a component of Ansible Automation Platform's Event-Driven Ansible (EDA). An unauthenticated remote attacker can bypass mutual Transport Layer Security (mTLS) authentication for event streams. This is achieved by manipulating the event stream URL and forging the HTTP Subject header. The system also inadvertently discloses the expected certificate subject in error messages, which simplifies the attack. This vulnerability allows an attacker to inject arbitrary events into EDA, potentially triggering automated workflows.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-18141
CVSS Score	8.2

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-18141/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-2026-18141

# 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/security/cve/CVE-2026-18141
https://bugzilla.redhat.com/show_bug.cgi?id=2508155

Generated by PoC Generator on 2026-08-01T16:57:02.622964832

Frequently asked questions¶

What is CVE-2026-18141?¶

CVE-2026-18141 is a High (8.2) vulnerability: A flaw was found in aap-gateway, a component of Ansible Automation Platform's…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-18141?¶

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-2026-18141?¶

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.