GHSA-jjgj-cpp9-cvpv: OpenClaw Vulnerable to Local File Exfiltration via MCP Tool Result MEDIA: Directive Injection

A malicious or compromised MCP (Model Context Protocol) tool server can exfiltrate arbitrary local files from the host system by injecting MEDIA: directives into tool result text content. OpenClaw’s tool result processing pipeline extracts file paths from MEDIA: tokens without source-level validation, passes them through a localRoots allowlist check that includes os.tmpdir() by default (covering /tmp on Linux/macOS and %TEMP% on Windows), and then reads and delivers the file contents to external messaging channels such as Discord, Slack, Telegram, and WhatsApp.