OWASP LLM Top 10 · All 10 Vulnerability Classes · Expert + Automated

OWASP LLM Top 10 Security Assessment

The definitive security assessment for enterprise LLM deployments — covering all 10 OWASP LLM vulnerability classes with automated scanning, expert manual testing, and actionable remediation guidance.

LLM01–10
Full Coverage
100+
Test Cases
72h
Report Delivery
CVSS
Scored Findings
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⚡ Live OWASP LLM Top 10 Security Assessment

Enter your LLM API endpoint or model type and get an instant OWASP LLM Top 10 risk assessment — all 10 vulnerability categories scored in real-time.

All 10 OWASP LLM Vulnerability Classes

Every assessment covers the complete OWASP LLM Top 10 — automated detection plus expert manual validation for complex attack scenarios.

LLM01 — PROMPT INJECTION

Prompt Injection

Attackers manipulate LLM behavior by crafting inputs that override system instructions. Direct injection targets the model directly; indirect injection plants malicious instructions in external data retrieved by the LLM (RAG systems, web browsing, tool outputs).

CRITICAL
Direct InjectionIndirect/RAGJailbreak
LLM02 — INSECURE OUTPUT HANDLING

Insecure Output Handling

LLM-generated content passed unsanitized to downstream systems enables XSS, CSRF, SSRF, privilege escalation, and remote code execution. Common in LLM-integrated web apps and code execution environments.

CRITICAL
XSS via LLMCode InjectionSSRF
LLM03 — TRAINING DATA POISONING

Training Data Poisoning

Adversarial manipulation of training datasets, fine-tuning data, or RLHF feedback to introduce backdoors, biases, or malicious behavior patterns that activate on specific trigger inputs.

HIGH
Backdoor AttacksBias InjectionRLHF Poisoning
LLM04 — MODEL DENIAL OF SERVICE

Model Denial of Service

Adversarial inputs that cause resource exhaustion — extremely long context windows, recursive prompts, computationally expensive reasoning chains — degrading service availability and increasing operational costs.

HIGH
Context FloodingCost Amplification
LLM05 — SUPPLY CHAIN VULNERABILITIES

Supply Chain Vulnerabilities

Risks from third-party model providers, pre-trained base models, plugins, datasets, and deployment infrastructure. Includes compromised model weights, malicious fine-tuning datasets, and vulnerable LLM framework dependencies.

HIGH
Third-Party ModelsPlugin Security
LLM06 — SENSITIVE INFORMATION DISCLOSURE

Sensitive Information Disclosure

LLMs inadvertently revealing training data (memorization attacks), system prompts, API keys in context, or confidential business information embedded in fine-tuning datasets or retrieved via RAG systems.

CRITICAL
Prompt ExtractionPII LeakageMemorization
LLM07 — INSECURE PLUGIN DESIGN

Insecure Plugin Design

LLM plugins and function-calling tools with insufficient input validation, overly broad permissions, or inadequate authentication enabling unauthorized data access, privilege escalation, and lateral movement.

HIGH
Tool PoisoningPrivilege Escalation
LLM08 — EXCESSIVE AGENCY

Excessive Agency

LLM-powered agents with excessive permissions, capabilities, or autonomy taking harmful actions beyond their intended scope — deleting files, sending emails, executing transactions, or modifying configurations without authorization.

CRITICAL
Agent AutonomyScope Violation
LLM09 — OVERRELIANCE

Overreliance

Organizational risk from excessive trust in LLM outputs without verification — leading to security decisions based on hallucinated vulnerability data, incorrect compliance guidance, or fabricated threat intelligence.

MEDIUM
Hallucination RiskProcess Design
LLM10 — MODEL THEFT

Model Theft

Unauthorized extraction of model architecture, weights, or training data through API abuse (model extraction attacks), side-channel analysis, or membership inference — enabling competitors to replicate proprietary AI without authorization.

HIGH
Model ExtractionMembership Inference

Assessment Methodology

Automated scanning combined with expert manual testing — no checkbox compliance, real attack simulation.

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Automated Scanning

Automated test suite executes 100+ prompt injection payloads, output handling tests, and information disclosure probes against your LLM API endpoints.

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Manual Expert Testing

Security engineers manually test complex attack chains — multi-turn prompt injection, indirect injection via RAG, plugin chaining attacks — that automated tools miss.

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CVSS-Scored Report

Every finding scored with CVSS v3.1, detailed proof-of-concept, business impact analysis, and prioritized remediation guidance — delivered within 72 hours.

Remediation Verification

Post-fix retesting validates that remediation is effective and doesn't introduce new vulnerabilities. Included in the assessment at no additional cost.

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Executive Summary

Board-ready executive summary with risk heat map, business impact scoring, and budget justification language for security investment decisions.

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AI Governance Alignment

Findings mapped to NIST AI RMF, ISO 42001, EU AI Act requirements — turn assessment results directly into governance documentation.

Frequently Asked Questions

What is the OWASP LLM Top 10?
The OWASP LLM Top 10 is an industry-standard framework published by OWASP (Open Web Application Security Project) identifying the 10 most critical security risks for applications built on Large Language Models. It covers attack classes unique to AI systems — from prompt injection and training data poisoning to model theft — providing a common vocabulary for AI security risk assessment.
Which LLMs and AI systems can be tested?
We test any LLM-powered application accessible via API or web interface — OpenAI GPT-4/4o, Anthropic Claude, Google Gemini, Meta Llama, Mistral, custom fine-tuned models, RAG systems, AI agents built on LangChain/LlamaIndex/AutoGen, and enterprise AI applications built on Azure OpenAI Service or Bedrock.
How long does an OWASP LLM assessment take?
Standard assessments deliver a full report within 72 hours of API/access provisioning. Complex multi-agent system assessments may require 5–7 business days. Expedited 24-hour reports are available for Enterprise customers.
Is prompt injection the most dangerous LLM vulnerability?
Prompt injection (LLM01) is consistently ranked the most critical because it's both highly prevalent and enables exploitation of other vulnerability classes. A successful indirect prompt injection attack via a retrieved document can trigger excessive agency (LLM08) to exfiltrate data, effectively chaining multiple OWASP LLM risks in a single attack.
Does the assessment include remediation guidance?
Yes — every finding includes a CVSS score, proof-of-concept reproduction steps, root cause analysis, and specific remediation guidance. After you implement fixes, we retest all identified vulnerabilities at no additional charge within 30 days of the original report.

Why OWASP LLM Security Matters in 2026

The integration of LLMs into enterprise workflows has dramatically expanded the attack surface. Traditional application security — input validation, authentication, authorization — remains necessary but is no longer sufficient. LLMs introduce fundamentally new attack vectors: the model itself becomes an attack surface through its ability to interpret and act on natural language instructions embedded in any input it processes.

High-profile incidents have validated these risks: LLM-powered chatbots manipulated into providing harmful content, RAG systems leaking confidential documents through carefully crafted queries, and AI agents performing unauthorized transactions after receiving indirect injection payloads in retrieved web pages.

Prompt Injection: The Critical Path

Prompt injection attacks exploit the fundamental tension in LLM design: the model must treat both instructions (system prompt) and data (user input, retrieved content) as natural language, making it inherently difficult to distinguish between "instruction to follow" and "data to process." Modern defenses include input sanitization, output filtering, privilege separation, and instruction hierarchy enforcement — but none are 100% reliable against sophisticated attackers.

Our assessment tests direct injection (user-controlled input), indirect injection (retrieved external content), multimodal injection (images containing embedded text instructions), and instruction hierarchy bypass techniques against your specific LLM implementation and deployment architecture.

Secure Your AI Before Attackers Do

Enterprise OWASP LLM assessments with 72-hour delivery. Trusted by AI security teams globally.

Starting ₹9,999 · 72-hour delivery · CVSS-scored findings · Remediation verification included