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~ similar to 2605.07324v1· 20 results

cs.CRcs.LGRecentMay 28, 2026

Dissecting the Black Box: Circuit-Level Analysis of LLM Vulnerability Detection

Syafiq Al Atiiq, Chun Zhou, Christian Gehrmann

The paper analyzes LLM vulnerability detection using mechanistic interpretability, finding that models primarily rely on safety detectors rather than direct vulnerability signature recognition.

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cs.CRcs.LGRecentMay 19, 2026

Awakening the Hydra: Stabilizing Multi-Concept Backdoor Injection in Text-to-Image Diffusion Models

Kai Wang, Jiale Zhang, Chengcheng Zhu, Chuang Ma +1 more

The paper proposes Hydra, a framework to stabilize and control the injection of multiple, conflicting backdoor triggers into text-to-image diffusion models, ensuring high attack reliability while main…

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cs.CRcs.CLRecentMay 14, 2026

MetaBackdoor: Exploiting Positional Encoding as a Backdoor Attack Surface in LLMs

Rui Wen, Mark Russinovich, Andrew Paverd, Jun Sakuma +1 more

The paper introduces MetaBackdoor, a novel class of LLM backdoor attacks that exploits positional encoding (length-based triggers) rather than requiring modifications to the textual content.

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cs.CRcs.AIRecentMay 17, 2026

Lightweight and Fast Backdoor Model Detection

Yinbo Yu, Jing Fang, Xuewen Zhang, Chunwei Tian +3 more

The paper proposes DFBScanner, a lightweight static parameter inspection framework that detects backdoor attacks by analyzing anomalous parameter updates in the final classification layer, achieving f…

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cs.CRcs.AIcs.CVRecentApr 10, 2026

CLIP-Inspector: Model-Level Backdoor Detection for Prompt-Tuned CLIP via OOD Trigger Inversion

Akshit Jindal, Saket Anand, Chetan Arora, Vikram Goyal

CLIP-Inspector (CI) is a novel model-level backdoor detection method that reconstructs potential triggers using out-of-distribution (OOD) images to verify the security of prompt-tuned CLIP models.

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cs.CRRecentMay 8, 2026

Cross-Modal Backdoors in Multimodal Large Language Models

Runhe Wang, Li Bai, Haibo Hu, Songze Li

The paper proposes a novel cross-modal backdoor attack that exploits the vulnerability of lightweight connectors in multimodal LLMs, demonstrating high attack success rates across different modalities…

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cs.CRcs.SERecentApr 30, 2026

How Code Representation Shapes False-Positive Dynamics in Cross-Language LLM Vulnerability Detection

Maofei Chen, Laifu Wang, Yue Qin, Yuan Wang +2 more

The paper demonstrates that using raw source text for fine-tuning LLMs on vulnerability detection causes high false-positive rates by memorizing surface-level syntax, a problem mitigated by using Abst…

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cs.CRcs.CVRecentApr 14, 2026

Scaling Exposes the Trigger: Input-Level Backdoor Detection in Text-to-Image Diffusion Models via Cross-Attention Scaling

Zida Li, Jun Li, Yuzhe Sha, Ziqiang Li +2 more

The paper introduces SET, a robust input-level backdoor detection framework that detects hidden malicious triggers in text-to-image diffusion models by analyzing systematic differences in how benign a…

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cs.CRRecentMay 10, 2026

BadDLM: Backdooring Diffusion Language Models with Diverse Targets

Shengfang Zhai, Xiaoyang Ji, Yuling Shi, Haoran Gao +5 more

The paper introduces BadDLM, a unified framework that demonstrates a new class of backdoor vulnerabilities in Diffusion Language Models (DLMs) by exploiting their forward masking process across divers…

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cs.CRcs.AIcs.CLRecentMay 28, 2026

Token-Level Generalization in LoRA Adapter Backdoors: Attack Characterization and Behavioral Detection

Travis Lelle

The paper demonstrates that LoRA adapters can be backdoored via data poisoning, showing the backdoor generalizes at the token feature level, and proposes robust behavioral and weight-level detectors f…

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cs.CRcs.AIcs.CLRecentMay 28, 2026

Token-Level Generalization in LoRA Adapter Backdoors: Attack Characterization and Behavioral Detection

Travis Lelle

This paper demonstrates that LoRA adapters can be backdoored via data poisoning, showing that the resulting backdoor generalizes at the token feature level, and proposes robust behavioral and weight-l…

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cs.CRcs.AIcs.CLRecentApr 23, 2026

Stealthy Backdoor Attacks against LLMs Based on Natural Style Triggers

Jiali Wei, Ming Fan, Guoheng Sun, Xicheng Zhang +2 more

The paper introduces BadStyle, a novel backdoor attack framework that generates natural, stealthy poisoned samples using LLMs to compromise various LLMs with high success rates and robust activation.

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cs.CRRecentApr 15, 2026

BackFlush: Knowledge-Free Backdoor Detection and Elimination with Watermark Preservation in Large Language Models

Jagadeesh Rachapudi, Ritali Vatsi, Pranav Singh, Praful Hambarde +1 more

BackFlush introduces a novel, knowledge-free framework that detects and eliminates unknown backdoor attacks in LLMs while simultaneously preserving existing watermarks, achieving high detection rates…

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cs.CRcs.CLRecentApr 14, 2026

Compiling Activation Steering into Weights via Null-Space Constraints for Stealthy Backdoors

Rui Yin, Tianxu Han, Naen Xu, Changjiang Li +7 more

The paper proposes a novel method to inject reliable, sustained backdoors into LLMs by compiling an activation steering vector into model weights, ensuring the backdoor only activates upon a specific…

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cs.CRcs.AIcs.LGRecentMay 24, 2026

Security in the Fine-Tuning Lifecycle of Large Language Models: Threats, Defenses,Evaluation, and Future Directions

Wenjuan Li, Yitao Liu, Runze Chen, Rajkumar Buyya

This paper provides a systematic, lifecycle-based framework for analyzing security threats and defenses across the entire fine-tuning process of LLMs, revealing that attack effectiveness is highly mod…

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cs.CRcs.LGRecentApr 22, 2026

Breaking Bad: Interpretability-Based Safety Audits of State-of-the-Art LLMs

Krishiv Agarwal, Ramneet Kaur, Colin Samplawski, Manoj Acharya +5 more

The paper conducts an interpretability-driven safety audit of eight state-of-the-art LLMs, demonstrating that while interpretability-based steering is a powerful auditing tool, model robustness varies…

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cs.CRcs.AIRecentApr 21, 2026

ProjLens: Unveiling the Role of Projectors in Multimodal Model Safety

Kun Wang, Cheng Qian, Miao Yu, Lilan Peng +5 more

The paper introduces ProjLens, an interpretability framework that reveals that backdoor vulnerabilities in Multimodal Large Language Models (MLLMs) are encoded within a low-rank subspace of the projec…

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cs.LGcs.AIcs.CLRecentApr 20, 2026

Towards Understanding the Robustness of Sparse Autoencoders

Ahson Saiyed, Sabrina Sadiekh, Chirag Agarwal

The paper demonstrates that integrating Sparse Autoencoders (SAEs) into transformer residual streams significantly enhances the robustness of Large Language Models against various jailbreak attacks by…

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cs.CRcs.AIRecentMay 19, 2026

Token by Token, Compromised: Backdoor Vulnerabilities in Unified Autoregressive Models

Tobias Braun, Jonas Henry Grebe, Hossein Shakibania, Anna Rohrbach +1 more

This paper introduces the Token by Token Backdoor Attack (ToBAC), demonstrating that unified autoregressive models (UAMs) are vulnerable to backdoor attacks where a single trigger can compromise multi…

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cs.CRcs.AIRecentApr 4, 2026

SecPI: Secure Code Generation with Reasoning Models via Security Reasoning Internalization

Hao Wang, Niels Mündler, Mark Vero, Jingxuan He +2 more

The paper introduces SecPI, a fine-tuning pipeline that teaches reasoning language models (RLMs) to autonomously internalize structured security reasoning, significantly improving secure code generati…

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