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New 'Latent Fusion Jailbreak' bypasses LLM safety measures with 94% success rate

Researchers have developed a novel white-box attack method called Latent Fusion Jailbreak (LFJ) that can bypass safety measures in large language models. LFJ works by combining a harmful query with a similar but harmless one, then interpolating their internal representations at specific layers and token positions. This technique achieved a 94.13% attack success rate across five open-weight models and four safety benchmarks. A latent adversarial training procedure was also introduced, which reduced the attack success rate to 12.37% when the attack was re-optimized against the defended model. AI

IMPACT This research highlights a significant vulnerability in current LLM safety alignment, potentially necessitating new defense strategies.

RANK_REASON Research paper detailing a new method for jailbreaking LLMs. [lever_c_demoted from research: ic=1 ai=1.0]

Read on arXiv cs.AI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

New 'Latent Fusion Jailbreak' bypasses LLM safety measures with 94% success rate

COVERAGE [1]

  1. arXiv cs.AI TIER_1 English(EN) · Wenpeng Xing, Bohan Yang, Mohan Li, Chunqiang Hu, Haitao Xu, Ningyu Zhang, Bo Lin, Meng Han ·

    Latent Fusion Jailbreak: Blending Harmful and Harmless Representations to Elicit Unsafe LLM Outputs

    arXiv:2508.10029v3 Announce Type: replace-cross Abstract: Safety-aligned large language models can still be manipulated through white-box interventions that modify their internal representations. We introduce Latent Fusion Jailbreak (LFJ), which works by pairing a harmful query w…