Attack Surface

Model layer Research

Security research involving core model architecture and parameters

1 matching entry out of 468 in this category

Model layer research results

1 entry

Backdoored PEFT adapters and limits of weight-only detection

Published Aug 3, 2026Analyzed Sep 9, 2026Source: arXiv

Third-party fine-tuning adapters may contain backdoors. Z-PEFT screens adapter weights using spectral features, evaluated on PADBench's 13,300 adapters.

Z-PEFT: Zero-shot Backdoor Detection in Parameter-Efficient Fine-Tuning via Canonical Spectral Signatures

Evaluated models: Llama 2 7B, Llama 2 13B, Qwen 1.5 7B+2 more

Llama 2 7B
Llama 2 13B
Qwen 1.5 7B
Flan-T5 XL
RoBERTa Base

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