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Last analyzed Sep 9, 2026

Language Model Security Database

985 research findings · 1119 evaluated models

Filtered research findings

798 entries

Matches every word across titles, descriptions, sources, affected systems, and models.

Hidden Prompt Injection Attacks

Published Analyzed Source: arXiv

Large Language Models (LLMs) are vulnerable to Compositional Instruction Attacks (CIA), where malicious prompts are embedded within seemingly harmless instructions. This allows attackers to bypass safety mechanisms and elicit harmful responses from the model, even if the individual components of the prompt would be flagged as safe. The attack exploits the model's inability to correctly identify underlying malicious intent within composite instructions.

Prompt packer: Deceiving llms through compositional instruction with hidden attacks
Evaluated models: ChatGLM2 6B, GPT-3.5 Turbo, GPT-4

Automated LLM Jailbreak

Published Analyzed Source: arXiv

Large Language Models (LLMs) are vulnerable to prompt-based jailbreaks, allowing adversaries to bypass safety guardrails and elicit undesirable outputs. The Prompt Automatic Iterative Refinement (PAIR) algorithm efficiently generates these jailbreaks using a limited number of black-box queries to the target LLM. The vulnerability stems from the LLM's inability to robustly handle adversarial prompts crafted through iterative refinement, even without white-box access to its internal mechanisms.

Jailbreaking black box large language models in twenty queries
Evaluated models: Claude Instant 1.2, Claude 2.1, Gemini Pro+6 more
  • Claude Instant 1.2
  • Claude 2.1
  • Gemini Pro
  • GPT-3.5 Turbo-1106
  • GPT-4-0125-preview
  • Llama 2 7B Chat
  • Llama Guard
  • Mixtral 8x7B Instruct
  • Vicuna 13B v1.5

Decoding-Based LLM Jailbreak

Published Analyzed Source: arXiv

Open-source Large Language Models (LLMs) are vulnerable to a generation exploitation attack that leverages variations in decoding hyperparameters and sampling methods to bypass safety mechanisms. Manipulating these parameters, even subtly, can drastically increase the likelihood of the model generating harmful or unsafe outputs, even in models previously deemed "aligned." The attack is effective even when removing only the system prompt.

Catastrophic jailbreak of open-source llms via exploiting generation
Evaluated models: GPT-3.5 Turbo

In-Context LLM Jailbreak

Published Analyzed Source: arXiv

Large Language Models (LLMs) are vulnerable to In-Context Attacks (ICA) and susceptible to mitigation via In-Context Defense (ICD). ICA leverages a small number of harmful demonstration examples within a prompt to elicit harmful responses from the LLM, even if it is otherwise safety-aligned. ICD counteracts ICA by prepending safe demonstration examples to the prompt, effectively reducing the likelihood of harmful output. The effectiveness of both ICA and ICD is demonstrated across multiple LLMs.

Jailbreak and guard aligned language models with only few in-context demonstrations
Evaluated models: GPT-4 0613, Llama 2 7B Chat, Mistral-7B-v2+4 more
  • GPT-4 0613
  • Llama 2 7B Chat
  • Mistral-7B-v2
  • Mixtral 8x7B
  • Qwen-7B-v2
  • Vicuna 13B v1.5
  • Vicuna 7B v1.5

Fine-tuning Compromises LLM Safety

Published Analyzed Source: arXiv

Fine-tuning aligned Large Language Models (LLMs) on a small number of adversarially crafted examples, or even on benign datasets, can compromise their safety alignment, leading to the generation of harmful or inappropriate content. This vulnerability exploits the few-shot learning capabilities of LLMs, allowing attackers to override existing safety mechanisms with minimal effort and cost. Even unintentional fine-tuning with seemingly benign datasets can result in unintended safety degradation.

Fine-tuning aligned language models compromises safety, even when users do not intend to!
Evaluated models: GPT-3.5 Turbo, Llama 2 13B Chat, Llama 2 70B Chat+2 more
  • GPT-3.5 Turbo
  • Llama 2 13B Chat
  • Llama 2 70B Chat
  • Llama 2 7B Chat
  • Llama-1

Visual Adversarial Tool Abuse

Published Analyzed Source: arXiv

A vulnerability exists in multimodal Large Language Models (LLMs) integrated with external tools. Adversarial images, visually indistinguishable from benign images, can manipulate the LLM to execute unintended tool commands, compromising the confidentiality and integrity of user resources. The attack is effective across diverse prompts, remaining stealthy both in the image itself and in the generated text response.

Misusing tools in large language models with visual adversarial examples
Evaluated models: Not reported

Automating Stealthy LLM Jailbreaks

Published Analyzed Source: arXiv

Large Language Models (LLMs) employing alignment techniques remain vulnerable to "jailbreak" attacks. The AutoDAN technique automatically generates semantically meaningful prompts that bypass safety features and elicit malicious outputs from aligned LLMs, unlike previous methods producing nonsensical prompts easily detectable by perplexity checks. These prompts exploit weaknesses in the LLM's alignment, causing it to generate responses that violate intended safety constraints.

Autodan: Generating stealthy jailbreak prompts on aligned large language models
Evaluated models: GPT-3.5 Turbo, GPT-4

Low-Resource Language Jailbreak

Published Analyzed Source: arXiv

Large Language Models (LLMs), such as GPT-4, exhibit a cross-lingual vulnerability in their safety mechanisms. Translating unsafe English prompts into low-resource languages, using readily available translation APIs like Google Translate, bypasses the LLM's safety filters and elicits harmful responses with a significantly higher success rate than attacks targeting the English language directly. The vulnerability stems from an unequal distribution of safety training data across languages…

Low-resource languages jailbreak gpt-4
Evaluated models: GPT-4

Auto-Generated LLM Jailbreaks

Published Analyzed Source: arXiv

Large Language Models (LLMs) are susceptible to automated jailbreak attacks using a fuzzing framework that generates variations of existing jailbreak prompts. This vulnerability allows bypassing built-in safety mechanisms, leading to the generation of harmful or unintended outputs. The vulnerability stems from the LLMs' inability to consistently recognize and reject semantically similar, but subtly different prompt variations generated through automated mutation techniques.

Gptfuzzer: Red teaming large language models with auto-generated jailbreak prompts
Evaluated models: Not reported

Universal Black-Box LLM Jailbreak

Published Analyzed Source: arXiv

A universal black-box jailbreaking vulnerability exists in Large Language Models (LLMs) due to their susceptibility to adversarial prompts crafted using a genetic algorithm (GA). The GA optimizes a universal adversarial prompt suffix that, when appended to various user inputs, causes the LLM to generate unintended and potentially harmful outputs, bypassing safety mechanisms. This attack requires no knowledge of the LLM's internal architecture or parameters.

Open sesame! universal black box jailbreaking of large language models
Evaluated models: Llama 2 7B Chat, Vicuna 7B

Research methodology

Entries summarize publicly available primary-source security research. Model names reflect only systems explicitly evaluated by the cited paper, and measurements are research-reported unless independent verification is stated.

Discovery and publication are separate: new papers enter a candidate queue, then require human review and explicit approval before publication. Updates follow that review process, not a guaranteed daily publishing schedule. “Last analyzed” is the newest analysis date among published entries; it does not mean that all recent research has been covered.