Please do not open a public GitHub issue for security vulnerabilities.
Use GitHub's private vulnerability reporting instead: Report a vulnerability
Include a description of the issue, steps to reproduce, and the version of MockTab you tested against. You can expect an acknowledgment within a few days.
MockTab runs without the macOS app sandbox (required for HID access and CGEventPost). This is a known limitation documented in MockTab/MockTab.entitlements. Vulnerabilities that require local code execution are generally out of scope; issues that allow privilege escalation or data exfiltration beyond what the unsandboxed process already permits are in scope.