Rubric Stealthy Preference Drift
LLM-as-a-Judge systems utilizing natural language rubrics are vulnerable to Rubric-Induced Preference Drift (RIPD). This vulnerability allows an attacker (or a flawed optimization process) to refine evaluation rubrics such that they maintain high agreement with human references on standard validation benchmarks while inducing systematic, directional preference degradation on unseen target domains. The attack exploits the disconnect between benchmark validation and target generalization by…
Evaluated models: Llama 3 8B, Llama 3.1 8B, DeepSeek V3+1 more
- Llama 3 8B
- Llama 3.1 8B
- DeepSeek V3
- Gemma 2 2B