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Safety Fine-Tuning at (Almost) No Cost: A Baseline for Vision Large Language Models

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arxiv 2402.02207 v2 pith:MBD6DYFK submitted 2024-02-03 cs.LG

Safety Fine-Tuning at (Almost) No Cost: A Baseline for Vision Large Language Models

classification cs.LG
keywords fine-tuningvllmsdatasetmodelssafetyharmfulvision-languagealignment
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Current vision large language models (VLLMs) exhibit remarkable capabilities yet are prone to generate harmful content and are vulnerable to even the simplest jailbreaking attacks. Our initial analysis finds that this is due to the presence of harmful data during vision-language instruction fine-tuning, and that VLLM fine-tuning can cause forgetting of safety alignment previously learned by the underpinning LLM. To address this issue, we first curate a vision-language safe instruction-following dataset VLGuard covering various harmful categories. Our experiments demonstrate that integrating this dataset into standard vision-language fine-tuning or utilizing it for post-hoc fine-tuning effectively safety aligns VLLMs. This alignment is achieved with minimal impact on, or even enhancement of, the models' helpfulness. The versatility of our safety fine-tuning dataset makes it a valuable resource for safety-testing existing VLLMs, training new models or safeguarding pre-trained VLLMs. Empirical results demonstrate that fine-tuned VLLMs effectively reject unsafe instructions and substantially reduce the success rates of several black-box adversarial attacks, which approach zero in many cases. The code and dataset are available at https://github.com/ys-zong/VLGuard.

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Forward citations

Cited by 14 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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    cs.LG 2026-06 conditional novelty 6.0

    A lightweight multi-instance contrastive classifier on MLLM hidden states predicts output harmfulness, matching input-side safety while sharply lowering over-refusal.

  2. ROBOSHACKLES: A Safety Dataset for Human-Injury Prevention in Embodied Foundation Models

    cs.RO 2026-06 unverdicted novelty 6.0

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  3. Unveiling Privacy Risks in Multi-modal Large Language Models: Task-specific Vulnerabilities and Mitigation Challenges

    cs.CR 2026-06 unverdicted novelty 6.0

    Introduces MM-Privacy dataset and evaluations showing MLLMs leak sensitive data from images in various tasks, highlighting task inconsistency effects.

  4. Defending Against Malicious Finetuning by Scaling Train-time Adversarial Attacks

    cs.CL 2026-06 unverdicted novelty 6.0

    Patcher improves LLM robustness to malicious full-parameter finetuning by scaling train-time adversarial attacks in a bi-level optimization loop and supplies an efficient parallel implementation.

  5. SafeSteer: Localized On-Policy Distillation for Efficient Safety Alignment

    cs.AI 2026-06 unverdicted novelty 6.0

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  9. VisInject: Disruption != Injection -- A Dual-Dimension Evaluation of Universal Adversarial Attacks on Vision-Language Models

    cs.CR 2026-05 conditional novelty 6.0

    Universal adversarial attacks cause output perturbation 90 times more often than precise target injection in VLMs, with only 2 verbatim successes out of 6615 tests.

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  11. Constitutional On-Policy Safe Distillation

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    COPSD uses a Cross-SFT cold-start followed by constitution-conditioned distillation to achieve stronger safety-helpfulness balance and lower safety tax on reasoning than prior on-policy self-distillation methods.

  12. New Wide-Net-Casting Jailbreak Attacks Risk Large Models

    cs.CR 2026-05 unverdicted novelty 5.0

    The paper demonstrates that a tailored jailbreak method for querying groups of large models can achieve up to 100% success rate in some experiments on unprotected models, revealing overlooked multi-model safety risks.

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    cs.CL 2025-03 unverdicted novelty 5.0

    Phi-4-Mini achieves strong math and coding performance with only 3.8B parameters via high-quality synthetic data, while Phi-4-Multimodal uses Mixture-of-LoRAs to integrate modalities and top speech recognition leaderboards.

  14. Harmful Fine-tuning Attacks and Defenses for Large Language Models: A Survey

    cs.CR 2024-09 unverdicted novelty 2.0

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