GHSA-52VM-MXX8-F227 Phantom: Arbitrary file write and decode-bomb DoS via unconfined MCP tool paths

Impact In Phantom = 1.3.0, when PHANTOMOUTPUTDIR was unset the default, the MCP tools accepted arbitrary absolute output paths with no confinement. Anything able to send tool calls e.g. an AI agent driving the MCP interface could write or overwrite arbitrary files the process user can write —...