Monday, October 26, 2026
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Research Radar, October 26, 2026: 11 new AI and security papers to know

The most relevant new AI and security research from Nature & arXiv, with the authors' own summaries and links to the papers.

11 papers, Nature & arXiv

New research on AI and security, selected for relevance to language models, AI agents and cybersecurity. Summaries are the authors’ or publisher’s own words, linked to the original.

Peer-reviewed

New preprints (not yet peer-reviewed)

WebAgentGuard: A Reasoning-Driven Guard Model for Detecting Prompt Injection Attacks in Web Agents

arXiv · Yulin Chen, Tri Cao, Haoran Li, Yibo Li, Yue Liu, Yufei He, Le Minh Khoi, Yangqiu Song, Shuicheng Yan, Bryan Hooi

Web agents powered by vision-language models (VLMs) enable autonomous interaction with web environments by perceiving and acting on both visual and textual webpage content to accomplish user-specified tasks. However, they are highly vulnerable to prompt injection attacks, where adversarial instructions embedded in HTML or rendered screenshots can manipulate agent behavior and lead to harmful outcomes such as information leakage.

Do AI-for-Science Agents Preserve Model Safety?

arXiv · Michael Yew Chuan Lee, Manya Sriram, N. Benjamin Erichson

AI-for-Science agents are increasingly being used for formulating scientific hypotheses, running autonomous experiments, and interpreting evidence. These agents are constructed by integrating a large language model (LLM) into a domain-specific agent harness, which in turn can improve the LLM's scientific capability and enable the model to orchestrate scientific tools.

Quantum Cadence: Post-Quantum Consensus with Multiple Concurrent Proposers

arXiv · Mohammad Mussadiq Jalalzai, Tobias Klenze, Jovan Komatovic

The consensus protocols of most high-performance blockchains use quorum certificates, which bundle the signatures of a quorum of validators. Signature schemes such as BLS can aggregate the signatures of a whole quorum into a single short signature, which keeps these certificates small.

Omni-UBench: Benchmarking Omni-Modal LLM-based Guardrails Across Safety, Utility, and Reliability

arXiv · Junhao Wang, Yidou Chen, Li Lu, Hongwei Yao, Xiaodan Li, Mengjie Wu, Yuefeng Chen, Zhan Qin, Kui Ren

Advances in Omni-modal Large Language Models (OLLMs) have enabled increasingly seamless human-AI interaction, but their unified processing of heterogeneous modalities also expands the attack surface, allowing adversaries to exploit richer input compositions to circumvent safety alignment. To counter such risks, omni-modal guardrails have been proposed to detect and filter unsafe queries across arbitrary modalities.

Knowing Whom to Trust is not Enough: The Trust–Agreement Gap in Repeated Multi-Party LLM Negotiation

arXiv · Amit Sarker, Moumita Choudhury, Saaduddin Mahmud, Shlomo Zilberstein

Large language model (LLM) agents increasingly participate in negotiations on behalf of individuals and organizations, yet they remain vulnerable to manipulation, particularly in repeated multi-party interactions. Classical multi-agent systems address this challenge through explicit trust and reputation models, whereas existing work on LLM negotiation largely treats trust as an emergent phenomenon.

Safe at One Loop, Risky at Another: Aligning Safety Across Recurrent Depths in Looped Language Models

arXiv · Yi Wang, Xiuyuan Qi, Dongqi Han, Dongsheng Li, Wenjie Wang

Looped Language Models (LoopLMs) provide a parameter efficient approach to scaling model capabilities through repeated use of shared parameters across recurrent steps. Since each recurrent depth can be read out independently, a single LoopLM exposes a broader output space across inference depths, raising an important question: whether safety is preserved throughout recurrent computation.

On Task, Off Track: Benchmarking LLM and Agent Robustness to Near-Target Prompt Injection

arXiv · Yuyang Gong, Zihao Wang, Jiawei Liu, XiaoFeng Wang

Prompt injection benchmarks assess whether large language models (LLMs) and agents resist malicious instructions embedded in external content. However, a system could perform well by rejecting attacks that obviously abandon the user's request, while still accepting changes that retain most of a legitimate answer but make it incorrect or harmful.

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