GLM 5.3 Model Successfully Breaches Firefox Security Updates

Epoch AI researchers reported that the GLM 5.3 model turned public security fixes into working exploits before updates reached Firefox users. The model autonomously compromised six Firefox releases at a cost of about $1,000 in API fees each, without triggering safeguards from any tested provider. This capability highlights the risks associated with open-weight models. This development underscores the need for enhanced security measures in open models, as vulnerabilities can lead to serious exploits. Companies must take greater precautions to protect their systems from such attacks.