Backdoor risk in open-weight AI models via abliteration and fine-tuning

Open-weight AI models with edited weights—whether fine-tuned, merged, or abliterated—can carry hidden backdoors. Abliteration, a popular technique that removes safety refusals, is highlighted as a common vector for distributing maliciously modified models. The core claim is that users downloading modified weights without verification are exposed to supply-chain attacks, though the article is an opinion piece without specific incidents.