Feast Feature Server vulnerabilities

A vulnerability in the Feast Feature Server's `/save-document` endpoint allows an unauthenticated remote attacker to write arbitrary JSON files to the server's filesystem. Despite location restrictions, these can be bypassed, enabling overwriting of critical application configurations or startup scripts.

A vulnerability in the `/ws/chat` endpoint of the Feast Feature Server allows remote attackers to establish persistent WebSocket connections without authentication. Opening a large number of simultaneous connections can exhaust server resources such as memory, CPU, and file descriptors, leading to a complete denial of service for legitimate users.

A security issue was discovered in the Feast Feature Server's `/read-document` endpoint that allows an unauthenticated remote attacker to read any file accessible to the server process. By sending a specially crafted HTTP POST request, an attacker can bypass intended access restrictions to potentially retrieve sensitive system files, application configurations, and credentials.