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Weak-to-Strong Jailbreaking on Large Language Models

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arxiv 2401.17256 v5 pith:AFZSKR6W submitted 2024-01-30 cs.CL

classification cs.CL
keywords weak-to-strongattackllmsmodelsjailbreakingalignedattacksdecoding
verification ladder T0 review T1 audit T2 compute T3 formal
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Large language models (LLMs) are vulnerable to jailbreak attacks - resulting in harmful, unethical, or biased text generations. However, existing jailbreaking methods are computationally costly. In this paper, we propose the weak-to-strong jailbreaking attack, an efficient inference time attack for aligned LLMs to produce harmful text. Our key intuition is based on the observation that jailbroken and aligned models only differ in their initial decoding distributions. The weak-to-strong attack's key technical insight is using two smaller models (a safe and an unsafe one) to adversarially modify a significantly larger safe model's decoding probabilities. We evaluate the weak-to-strong attack on 5 diverse open-source LLMs from 3 organizations. The results show our method can increase the misalignment rate to over 99% on two datasets with just one forward pass per example. Our study exposes an urgent safety issue that needs to be addressed when aligning LLMs. As an initial attempt, we propose a defense strategy to protect against such attacks, but creating more advanced defenses remains challenging. The code for replicating the method is available at https://github.com/XuandongZhao/weak-to-strong

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Forward citations

Cited by 16 Pith papers

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

  1. SlotGCG: Exploiting the Positional Vulnerability in LLMs for Jailbreak Attacks

    cs.CR 2026-06 unverdicted novelty 7.0 of 10

    SlotGCG uses Vulnerable Slot Score (VSS) to identify and target the most vulnerable prompt positions for adversarial token insertion, delivering 14% higher ASR than standard GCG and 42% higher against defenses.

  2. Weak-to-Strong On-Policy Distillation

    cs.LG 2026-07 conditional novelty 6.0 of 10

    A strong LLM is improved by distilling from the logit difference of two weaker models instead of from a stronger teacher.

  3. The Geometry of Refusal: Linear Instability in Safety-Aligned LLMs

    cs.CR 2026-06 unverdicted novelty 6.0 of 10

    Contrastive Logit Steering isolates a linear refusal direction in safety-aligned LLMs, achieving higher jailbreak success than activation steering and enabling bidirectional control without retraining.

  4. The Geometry of Refusal: Linear Instability in Safety-Aligned LLMs

    cs.CR 2026-06 unverdicted novelty 6.0 of 10

    Refusal behavior in safety-aligned LLMs forms a linear feature in logit space that Contrastive Logit Steering can manipulate to bypass or reinforce alignment across multiple model families.

  5. CausalDetox: Causal Head Selection and Intervention for Language Model Detoxification

    cs.CL 2026-04 unverdicted novelty 6.0 of 10

    CausalDetox identifies minimal attention heads causally linked to toxicity via Probability of Necessity and Sufficiency, then applies targeted inference-time steering or fine-tuning to reduce toxic generation while pr...

  6. SoK: Systematizing LLM Prompt Security: Taxonomies, Datasets, and Unified Evaluation of Attacks and Defenses

    cs.CR 2025-10 conditional novelty 6.0 of 10

    A systemization of LLM jailbreak security that adds linked taxonomies, an evaluation platform, and JailbreakDB, while its main attack–defense comparison results remain deferred.

  7. Toward Principled LLM Safety Testing: Solving the Jailbreak Oracle Problem

    cs.CR 2025-06 unverdicted novelty 6.0 of 10

    Formalizes the jailbreak oracle problem for LLMs and introduces Boa, a two-phase breadth-first then depth-first search system to solve it efficiently.

  8. Peering Behind the Shield: Guardrail Identification in Large Language Models

    cs.CR 2025-02 unverdicted novelty 6.0 of 10

    AP-Test identifies deployed guardrails in LLMs via adversarial prompt testing and a match score metric, reporting perfect accuracy on four open-source guardrails.

  9. How Jailbreak Attacks Inform Safety Alignment: A Defender-Centric, Shapley-Based Evaluation of Jailbreak Contributions

    cs.CR 2026-07 conditional novelty 5.0 of 10

    Attacks that break LLMs best are not the ones that improve safety most; a Shapley- and greedy-based framework that selects attack subsets by downstream defender utility outperforms attacker-centric and attribution-onl...

  10. Skills as Verifiable Artifacts: A Trust Schema and a Biconditional Correctness Criterion for Human-in-the-Loop Agent Runtimes

    cs.CR 2026-05 unverdicted novelty 5.0 of 10

    Agent skills must be verified as untrusted code using a trust schema with verification levels and a biconditional correctness criterion to enable sustainable human-in-the-loop agent systems.

  11. Representation-Aware Unlearning via Activation Signatures: From Suppression to Entity-Signature Erasure

    cs.CL 2026-01 reject novelty 5.0 of 10

    KIF reports near-oracle entity unlearning on TOFU (FQ=0.99, MU=0.62) by suppressing subject-specific activation directions and distilling the behavior into LoRA, but its 'internal attenuation' evidence rests on an out...

  12. Layer-Wise Perturbations via Sparse Autoencoders for Adversarial Text Generation

    cs.CL 2025-08 reject novelty 5.0 of 10

    Sparse autoencoder activation perturbation (SFPF) applied on top of existing jailbreak prompts raises attack success rate on Qwen3-32B, but with no defense evaluation and weak reproducibility.

  13. Beyond Surface-Level Detection: Towards Cognitive-Driven Defense Against Jailbreak Attacks via Meta-Operations Reasoning

    cs.AI 2025-08 unverdicted novelty 5.0 of 10

    A jailbreak defense that reasons about hidden manipulations in attack prompts, trained with supervised fine-tuning plus entropy-guided reinforcement learning, generalizes to attacks never seen in training.

  14. Skills as Verifiable Artifacts: A Trust Schema and a Biconditional Correctness Criterion for Human-in-the-Loop Agent Runtimes

    cs.CR 2026-05 unverdicted novelty 4.0 of 10

    Proposes a trust schema including verification levels and a biconditional correctness criterion to verify skills in human-in-the-loop agent runtimes, reducing the need for constant oversight.

  15. Jailbreak Attacks and Defenses Against Large Language Models: A Survey

    cs.CR 2024-07 accept novelty 4.0 of 10

    A survey that creates taxonomies for jailbreak attacks and defenses on LLMs, subdivides them into sub-classes, and compares evaluation approaches.

  16. Safety at Scale: A Comprehensive Survey of Large Model and Agent Safety

    cs.CR 2025-02 unverdicted novelty 2.0 of 10

    A comprehensive survey that taxonomizes safety threats to large models and agents, reviews defenses and benchmarks, and outlines open challenges.

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