The author of popular macOS open source terminal emulator iTerm2 has rushed out a new version (v3.3.6) because prior iterations have a security flaw that could allow an attacker to execute commands on a computer using the application.

The vulnerability (CVE-2019-9535) was identified through the Mozilla Open Source Support Program (MOSS), which arranged to audit iTerm2 under its remit to review open source projects for security problems. A third-party security biz, Radically Open Security, performed the audit.

In a post to an iTerm2 discussion group, developer George Nachman said, “As part of this audit, a problem was discovered which could cause iTerm2 to issue commands in response to receiving certain input.”