Language Model Security Database

A vulnerability exists in the safety alignment mechanisms of Large Language Models (LLMs) related to the model's intent perception capabilities. The specific attack vector, termed "Perceived-importance Flatten" (PiF), circumvents safety guardrails by modifying neutral-intent tokens within a malicious prompt using synonym replacement. Unlike traditional jailbreak attacks that rely on appending lengthy, high-perplexity adversarial suffixes (which suffer from distributional dependency and often…

A resource exhaustion and algorithmic complexity vulnerability exists in applications utilizing Reasoning Large Language Models (e.g., OpenAI o1, DeepSeek R1) that process untrusted external context (such as Retrieval-Augmented Generation systems). The vulnerability, dubbed "OverThink," allows an attacker to perform an indirect prompt injection by embedding "decoy" reasoning problems—specifically computation-intensive tasks like Sudoku puzzles or Markov Decision Processes (MDPs)—into the…

Large Language Models (LLMs) with refusal training are vulnerable to a "jailbreaking-to-jailbreak" (J2) attack. A J2 attack involves initially jailbreaking a powerful LLM to create a "J2 attacker." This attacker, instructed with general jailbreaking strategies, then autonomously attempts to jailbreak other LLMs, including potentially the same model it was derived from, by iteratively refining its attack based on previous attempts and in-context learning.

Large Language Models (LLMs) are vulnerable to structure transformation attacks, where malicious prompts are encoded in diverse syntax spaces (e.g., SQL, JSON, LLM-generated syntaxes) to bypass safety mechanisms. These attacks maintain the harmful intent while altering the linguistic structure, making detection based on token-level patterns ineffective.

Large Language Models (LLMs) are vulnerable to "Rewrite to Jailbreak" (R2J) attacks. R2J exploits the models' safety mechanisms by iteratively rewriting harmful prompts, subtly altering wording to bypass safety filters while maintaining the original malicious intent. This differs from previous methods which rely on adding extraneous prefixes/suffixes or creating forced instruction-following scenarios, thus being more difficult to detect.

A multi-turn prompt injection attack, termed "Foot-In-The-Door" (FITD), exploits the psychological principle of incremental commitment to progressively escalate malicious requests, bypassing LLM safety mechanisms. The attack leverages intermediate "bridge" prompts and self-alignment techniques to coax the model into generating increasingly harmful outputs, even when initially refusing similar direct requests.

A novel "Flanking Attack" exploits the vulnerability of multimodal LLMs (e.g., Google Gemini) to bypass content moderation filters by embedding adversarial prompts within a sequence of benign prompts. The attack leverages the LLM's processing of both audio and text, obfuscating harmful requests through contextualization and layering, thereby yielding policy-violating responses.

Large Language Models (LLMs) with structured output interfaces are vulnerable to jailbreak attacks that exploit the interaction between token-level inference and sentence-level safety alignment. Attackers can manipulate the model's output by constructing attack patterns based on prefixes of safety refusal responses and desired harmful outputs, effectively bypassing safety mechanisms through iterative API calls and constrained decoding. This allows the generation of harmful content despite…

Large Language Models (LLMs), specifically Llama 2, Llama 3, Gemma, and Vicuna, are vulnerable to an adaptive, distributional adversarial attack methodology termed "REINFORCE." Existing gradient-based jailbreak attacks (such as Greedy Coordinate Gradient - GCG) typically optimize adversarial suffixes to maximize the likelihood of a fixed affirmative response (e.g., "Sure, here is how"). The REINFORCE method circumvents this by treating the LLM as a probabilistic policy and using Reinforcement…

Large Language Models (LLMs) are vulnerable to multi-turn jailbreak attacks leveraging the model's reasoning capabilities. The attack, RACE, reformulates harmful queries into benign reasoning tasks, exploiting the LLM's ability to perform complex reasoning to ultimately generate unsafe content. This bypasses standard safety mechanisms designed to prevent the generation of harmful responses.