Secure your AI.
Assure your future.
Lean Security provides expert manual penetration testing for Large Language Models (LLMs) and generative AI integrations. We identify prompt injection and data leakage before they compromise your app.
Why Traditional Security Fails
Integrating LLMs rapidly accelerates capability, but traditional Web Application Firewalls (WAFs) and vulnerability scanners cannot detect the logical manipulation of AI models.
- Prompt Injection: Attackers override system prompts to execute unauthorised instructions.
- Insecure Output Handling: AI responses causing XSS or SSRF.
- Data Leakage: Inadvertently exposing PII or proprietary data.
AI models parse semantic intent, not syntax. Traditional rulesets fail to drop the payload.
Expert testing against the OWASP Top 10 for LLMs
Automated tools cannot understand the context of AI hallucinations. Our senior penetration testers manually probe your AI implementations using cutting-edge adversarial techniques.
- Direct & Indirect Prompt Injection: Testing for bypasses and poisoned external data streams.
- Excessive Agency: Ensuring your AI agents cannot take unauthorised, destructive actions via backend APIs.
- Data Poisoning & Supply Chain: Evaluating the integrity of your fine-tuning data and Vector DBs.
Our AI Testing Methodology
Architecture Review
We analyse your LLM architecture, safety guardrails, Vector DB integrations, and API connection points to map the threat landscape.
Adversarial Probing
Our ethical hackers manually fuzz prompts and context windows to bypass filters, trigger hallucinations, and execute injection attacks.
Impact Assessment
We demonstrate the true business risk, proving whether an attacker can extract PII or pivot into your internal network.
Zero-Friction Fixes
We supply human-verified fixes and prompt engineering advice directly to your development workflows (Jira, ServiceNow).
Proven Expertise You Can Trust
We don't rely on junior analysts or automated scripts. Every AI penetration test is conducted by Australian-based, senior security researchers with deep, real-world experience in adversarial machine learning and application security.
As a trusted authority, our human-verified results provide your board and enterprise clients with independent assurance that your AI features comply with frameworks like ISO/IEC 42001.
Validate risk as your business changes.
Partner with Lean Security for high-quality penetration testing, remediation assistance, and continuous security assurance.