Google’s Vertex AI SDK could allow RCE through bucket squatting

Google's Vertex AI SDK for Python had a design flaw that could allow attackers to hijack and poison AI models through bucket squatting (creating cloud storage buckets with names matching those expected by other projects). An attacker who knew a victim's project ID and region could create a bucket with the same name, trick the SDK into uploading models there, replace the model with malicious code, and achieve RCE (remote code execution, where an attacker runs commands on a system they don't control) when the poisoned model was loaded using Python's pickle deserialization (a process that can execute hidden code in specially formatted data).