Unpatch Ollama Flaw: Malicious Model Uploads Can Leak Server Heap Memory

A critical unauthenticated information-disclosure vulnerability (CVE-2026-5757) was found in Ollama’s model quantization engine: specially crafted GGUF model uploads can trigger unsafe memory slicing that reads heap contents, which may be written into a model layer and exfiltrated via the registry API; no patch is available, so administrators should restrict uploads, accept only trusted models, and isolate deployments.