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Last analyzed Sep 9, 2026

Language Model Security Database

985 research findings · 1119 evaluated models

Filtered research findings

27 entries

Matches every word across titles, descriptions, sources, affected systems, and models.

Incomplete MCP Tool-Call Attack Detection

Published Analyzed Source: arXiv

The MTGuard study evaluates unsafe Model Context Protocol tool calls originating from compromised server data, host-side execution changes, and malicious user-controlled resources. Its hybrid monitor combines pre-execution parameter inspection, behavioral observation, and post-execution result verification across browser-automation and financial-analysis agents.

Hybrid Analysis for Secure MCP Tool Use in LLM Agents
Evaluated models: GPT-5.6 Luna, DeepSeek V4 Flash, DeepSeek V4-Pro

Stage-Sequential Agent Escalation

Published Analyzed Source: arXiv

Agentic Large Language Model (LLM) systems utilizing persistent memory, Retrieval-Augmented Generation (RAG) pipelines, and external tool connectors are vulnerable to Logic-layer Prompt Control Injection (LPCI). An attacker can inject obfuscated (e.g., encoded, structurally nested, or semantically reframed) payloads into external memory stores or RAG documents. These payloads bypass conventional inference-time plaintext content filters, persist across session boundaries, and remain dormant…

LAAF: Logic-layer Automated Attack Framework A Systematic Red-Teaming Methodology for LPCI Vulnerabilities in Agentic Large Language Model Systems
Evaluated models: GPT-4o Mini, Claude 3 Haiku, Llama 3.1 70B Instruct+2 more
  • GPT-4o Mini
  • Claude 3 Haiku
  • Llama 3.1 70B Instruct
  • Gemini 2.0 Flash
  • Mixtral 8x7B Instruct

Autonomous Agent Tool RCE

Published Analyzed Source: arXiv

The OpenClaw autonomous agent framework lacks execution sandboxing, running agents directly on the host machine with the disk and system privileges of the host user. This architecture allows attackers to achieve Remote Code Execution (RCE) and arbitrary data exfiltration via Indirect Prompt Injection. By embedding malicious instructions within external data sources (e.g., scraped web pages or uploaded documents), an attacker can hijack the agent's planning capabilities to sequentially chain…

Uncovering Security Threats and Architecting Defenses in Autonomous Agents: A Case Study of OpenClaw
Evaluated models: Not reported

Agent Lifecycle Compound Threats

Published Analyzed Source: arXiv

OpenClaw is vulnerable to persistent memory poisoning, allowing an attacker to manipulate the agent's long-term memory store (MEMORY.md) via prompt injection. Because the autonomous agent continuously integrates this memory file as context for all subsequent reasoning and task planning, injected payloads act as durable behavioral constraints. This allows an attacker to persistently alter the agent's core policy, manipulate tool selection, and hijack future sessions without any further…

Taming openclaw: Security analysis and mitigation of autonomous llm agent threats
Evaluated models: Not reported

Adaptive Agent Tool Injection

Published Analyzed Source: arXiv

Agentic LLMs integrated with external data services (e.g., Model Context Protocol, MCP) are vulnerable to Adaptive Indirect Prompt Injection (IPI) attacks. When an agent queries external servers, attackers can inject malicious payloads into the retrieved content to hijack the agent's reasoning process and force the execution of high-authority tools. Unlike traditional static prompt injections, this vulnerability dynamically exploits the agent's internal logic audit. By using Markovian…

AdapTools: Adaptive Tool-based Indirect Prompt Injection Attacks on Agentic LLMs
Evaluated models: GPT-4.1, DeepSeek R1, Gemini 2.5 Flash+3 more
  • GPT-4.1
  • DeepSeek R1
  • Gemini 2.5 Flash
  • Qwen 3 8B
  • Llama 3.1 8B
  • Mistral 8B

Long-Horizon Agent Attacks

Published Analyzed Source: arXiv

LLM agents equipped with tool-use, persistent memory, and environmental interaction capabilities are vulnerable to long-horizon attacks. Attackers can bypass single-turn safety guardrails by exploiting the temporal dimension of multi-turn interactions to incrementally steer agent behavior. The vulnerability manifests because the agent's safety mechanisms perform localized, single-step evaluations but fail to maintain semantic safety across extended interaction trajectories. This enables…

AgentLAB: Benchmarking LLM Agents against Long-Horizon Attacks
Evaluated models: GPT-4o, GPT-5.1, Gemini 3 Flash+1 more
  • GPT-4o
  • GPT-5.1
  • Gemini 3 Flash
  • Claude Sonnet 4.5

MCP Description-Code Inconsistency

Published Analyzed Source: arXiv

The Model Context Protocol (MCP) architecture lacks a semantic verification mechanism to enforce consistency between a tool's documented behavior (exposed to the Large Language Model via JSON schemas) and its actual executable logic. This design gap allows MCP Servers to present benign, read-only, or limited-scope descriptions to the LLM agent while implementing undocumented, privileged, or state-mutating functionality in the underlying code. An attacker can exploit this description–code…

Don't believe everything you read: Understanding and Measuring MCP Behavior under Misleading Tool Descriptions
Evaluated models: Not reported

Autonomous Agent Prompt Reveal

Published Analyzed Source: arXiv

A vulnerability exists in Large Language Model (LLM) deployments and multi-agent systems where an autonomous attacker agent can systematically extract hidden system prompts through self-evolving interaction strategies. The vulnerability leverages a "JustAsk" framework which utilizes Upper Confidence Bound (UCB) exploration to dynamically select and refine attack vectors from a hierarchical taxonomy of 14 atomic skills (e.g., structural formatting, authority appeals) and 14 multi-turn…

Just Ask: Curious Code Agents Reveal System Prompts in Frontier LLMs
Evaluated models: o1, Llama 3.1 70B Hanami X1, Phi-4+38 more
  • o1
  • Llama 3.1 70B Hanami X1
  • Phi-4
  • Aion 1.0
  • Sonar Pro
  • Command A
  • Llama 4 Maverick
  • Llama 3.1 Nemotron Ultra 253B v1
  • Qwen 3 235B-A22B
  • Mercury
  • Hunyuan A13B Instruct
  • UI-TARS 1.5 7B
  • GPT-oss 120B
  • Jamba Mini 1.7
  • Hermes 4 70B
  • Step 3
  • LongCat Flash Chat
  • Tongyi DeepResearch 30B-A3B
  • Cydonia 24B v4.1
  • ERNIE 4.5 21B-A3B Thinking
  • Granite 4.0 H Micro
  • LFM2 8B-A1B
  • Nova Premier v1
  • Kimi K2 Thinking
  • KAT Coder Pro
  • Cogito v2.1 671B
  • Gemini 3 Pro Preview
  • Grok 4.1 Fast
  • Claude Opus 4.5
  • TNG R1T Chimera
  • Intellect 3
  • DeepSeek V3.2 Speciale
  • Trinity Mini
  • Mistral Large 2512
  • DeepSeek V3.1 Nex N1
  • MiMo V2 Flash
  • GLM-4.7
  • MiniMax M2.1
  • Seed 1.6
  • Molmo 2 8B
  • GPT-5.2 Codex

MCP Server-Side Injection

Published Analyzed Source: arXiv

The Model Context Protocol (MCP) specification v1.0 contains fundamental architectural vulnerabilities enabling server-side prompt injection and privilege escalation. The protocol relies on bidirectional sampling (sampling/createMessage) without cryptographic origin authentication or UI distinction, allowing connected servers to inject content that the LLM backend interprets as legitimate user input. Additionally, the protocol lacks isolation boundaries between concurrent server connections…

Breaking the Protocol: Security Analysis of the Model Context Protocol Specification and Prompt Injection Vulnerabilities in Tool-Integrated LLM Agents
Evaluated models: GPT-4o, Claude 3.5 Sonnet, Llama 3.1 70B

Research methodology

Entries summarize publicly available primary-source security research. Model names reflect only systems explicitly evaluated by the cited paper, and measurements are research-reported unless independent verification is stated.

Discovery and publication are separate: new papers enter a candidate queue, then require human review and explicit approval before publication. Updates follow that review process, not a guaranteed daily publishing schedule. “Last analyzed” is the newest analysis date among published entries; it does not mean that all recent research has been covered.