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Large Language Model (LLM) agents have achieved rapid adoption and demonstrated remarkable capabilities across a wide range of applications. To improve reasoning and task execution, modern LLM agents would incorporate memory modules or…

Cryptography and Security · Computer Science 2026-04-14 Xingyu Lyu , Jianfeng He , Ning Wang , Yidan Hu , Tao Li , Danjue Chen , Shixiong Li , Yimin Chen

Large language model (LLM) agents increasingly rely on external memory systems to remain consistent across long-horizon interactions, but little empirical work has been done to understand the specific failure modes and design choices that…

Artificial Intelligence · Computer Science 2026-05-27 Ishir Garg , Neel Kolhe , Dawn Song , Xuandong Zhao

Growing applications of large language models (LLMs) trained by a third party raise serious concerns on the security vulnerability of LLMs.It has been demonstrated that malicious actors can covertly exploit these vulnerabilities in LLMs…

Cryptography and Security · Computer Science 2023-12-11 Shuli Jiang , Swanand Ravindra Kadhe , Yi Zhou , Ling Cai , Nathalie Baracaldo

Equipping Large Language Models (LLMs) with persistent memory enhances interaction continuity and personalization but introduces new safety risks. Specifically, contaminated or biased memory accumulation can trigger abnormal agent…

Computation and Language · Computer Science 2026-05-22 Weiwei Xie , Shaoxiong Guo , Fan Zhang , Tian Xia , Xue Yang , Lizhuang Ma , Junchi Yan , Qibing Ren

Large Language Model (LLM) agents are powering a growing share of interactive web applications, yet remain vulnerable to misuse and harm. Prior jailbreak research has largely focused on single-turn prompts, whereas real harassment often…

Artificial Intelligence · Computer Science 2025-10-22 Trilok Padhi , Pinxian Lu , Abdulkadir Erol , Tanmay Sutar , Gauri Sharma , Mina Sonmez , Munmun De Choudhury , Ugur Kursuncu

Deep Research (DR) agents built on Large Language Models (LLMs) can perform complex, multi-step research by decomposing tasks, retrieving online information, and synthesizing detailed reports. However, the misuse of LLMs with such powerful…

Cryptography and Security · Computer Science 2025-10-24 Shuo Chen , Zonggen Li , Zhen Han , Bailan He , Tong Liu , Haokun Chen , Georg Groh , Philip Torr , Volker Tresp , Jindong Gu

As Large Language Models (LLMs) grow increasingly powerful, multi-agent systems are becoming more prevalent in modern AI applications. Most safety research, however, has focused on vulnerabilities in single-agent LLMs. These include prompt…

Multiagent Systems · Computer Science 2024-10-11 Donghyun Lee , Mo Tiwari

Agents utilizing tools powered by large language models (LLMs) or vision-language models (VLMs) have demonstrated remarkable progress in diverse tasks across text and visual modalities. Unlike traditional tools such as calculators, which…

Computation and Language · Computer Science 2025-10-09 Yunzhong Xiao , Yangmin Li , Hewei Wang , Yunlong Tang , Zora Zhiruo Wang

The proliferation of open-weight Large Language Models (LLMs) has democratized agentic AI, yet fine-tuned weights are frequently shared and adopted with limited scrutiny beyond leaderboard performance. This creates a risk where third-party…

Cryptography and Security · Computer Science 2026-03-05 Bhanu Pallakonda , Mikkel Hindsbo , Sina Ehsani , Prag Mishra

Modern LLM agents solve complex tasks by operating in iterative execution loops, where they repeatedly reason, act, and self-evaluate progress to determine when a task is complete. In this work, we show that while this self-directed loop…

Cryptography and Security · Computer Science 2026-05-08 Huiyu Xu , Zhibo Wang , Wenhui Zhang , Ziqi Zhu , Yaopeng Wang , Kui Ren , Chun Chen

Previous benchmarks on prompt injection in large language models (LLMs) have primarily focused on generic tasks and attacks, offering limited insights into more complex threats like data exfiltration. This paper examines how prompt…

Cryptography and Security · Computer Science 2025-06-03 Meysam Alizadeh , Zeynab Samei , Daria Stetsenko , Fabrizio Gilardi

Agent-assisted memory recall is one critical research problem in the field of human-computer interaction. In conventional methods, the agent can retrieve information from its equipped memory module to help the person recall incomplete or…

Artificial Intelligence · Computer Science 2025-08-01 Qian Zhao , Zhuo Sun , Bin Guo , Zhiwen Yu

Large Language Models (LLMs) have shown remarkable capabilities in tool calling and tool usage, but suffer from hallucinations where they choose incorrect tools, provide malformed parameters and exhibit 'tool bypass' behavior by performing…

Artificial Intelligence · Computer Science 2026-01-09 Kait Healy , Bharathi Srinivasan , Visakh Madathil , Jing Wu

In a malicious tool attack, an attacker uploads a malicious tool to a distribution platform; once a user inadvertently installs the tool and the LLM agent selects it during task execution, the tool can compromise the user's security and…

Cryptography and Security · Computer Science 2026-05-12 Yuepeng Hu , Yuqi Jia , Mengyuan Li , Dawn Song , Neil Gong

Equipping LLM agents with real-world tools can substantially improve productivity. However, granting agents autonomy over tool use also transfers the associated privileges to both the agent and the underlying LLM. Improper privilege usage…

Cryptography and Security · Computer Science 2026-04-21 Quan Zhang , Lianhang Fu , Lvsi Lian , Gwihwan Go , Yujue Wang , Chijin Zhou , Yu Jiang , Geguang Pu

Large language models (LLMs) are now routinely used to autonomously execute complex tasks, from natural language processing to dynamic workflows like web searches. The usage of tool-calling and Retrieval Augmented Generation (RAG) allows…

Cryptography and Security · Computer Science 2026-04-13 Dennis Rall , Bernhard Bauer , Mohit Mittal , Thomas Fraunholz

Memory emerges as the core module in the large language model (LLM)-based agents for long-horizon complex tasks (e.g., multi-turn dialogue, game playing, scientific discovery), where memory can enable knowledge accumulation, iterative…

Computation and Language · Computer Science 2026-05-04 Yanchen Wu , Tenghui Lin , Yingli Zhou , Fangyuan Zhang , Qintian Guo , Xun Zhou , Sibo Wang , Xilin Liu , Yuchi Ma , Yixiang Fang

Personalized agents that interact with users over long periods must maintain persistent memory across sessions and update it as circumstances change. However, existing benchmarks predominantly frame long-term memory evaluation as fact…

Computation and Language · Computer Science 2026-04-23 Md Nayem Uddin , Kumar Shubham , Eduardo Blanco , Chitta Baral , Gengyu Wang

LLM agents are evolving rapidly, powered by code execution, tools, and the recently introduced agent skills feature. Skills allow users to extend LLM applications with specialized third-party code, knowledge, and instructions. Although this…

Cryptography and Security · Computer Science 2026-02-26 David Schmotz , Luca Beurer-Kellner , Sahar Abdelnabi , Maksym Andriushchenko

Most Large Language Model (LLM) agent memory systems rely on a small set of static, hand-designed operations for extracting memory. These fixed procedures hard-code human priors about what to store and how to revise memory, making them…

Computation and Language · Computer Science 2026-05-26 Haozhen Zhang , Quanyu Long , Jianzhu Bao , Tao Feng , Weizhi Zhang , Haodong Yue , Wenya Wang