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OWASP Risks Atlasby Jer Catallo
LLM Security

OWASP Top 10 for LLM Applications

OWASP Top 10 for Large Language Model applications, covering prompt injection, data poisoning, supply chain vulnerabilities, and model security risks.

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Showing official OWASP 2025 LLM Security categories

LLM Security categories for 2025
RankTitleSummaryDetails
#1Prompt InjectionUntrusted input can override instructions, manipulate tool usage, or redirect model behavior away from its intended policy boundaries.View Details
#2Sensitive Information DisclosureModels and surrounding systems can expose secrets, internal data, personal information, or hidden context during generation.View Details
#3Supply ChainRisk enters through models, datasets, plugins, packages, hosted services, and other dependencies that make up the LLM application stack.View Details
#4Data and Model PoisoningTraining, fine-tuning, or retrieval data can be tampered with to corrupt outputs, bias behavior, or introduce hidden triggers.View Details
#5Improper Output HandlingTreating model output as inherently safe can turn generated content into a direct path to downstream vulnerabilities.View Details
#6Excessive AgencyGranting an LLM too much authority over tools, workflows, or business decisions expands the blast radius of mistakes and abuse.View Details
#7System Prompt LeakageAttackers may extract hidden instructions or privileged context that reveal internal behavior and weaken defenses.View Details
#8Vector and Embedding WeaknessesEmbedding pipelines and vector stores can be manipulated or queried in ways that expose data or distort retrieval results.View Details
#9MisinformationHallucinated or misleading responses can drive harmful decisions when applications over-trust the model's apparent confidence.View Details
#10Unbounded ConsumptionWithout budget, token, or workload controls, attackers or misuse can create runaway compute and cost exposure.View Details