CVE-2026-113732 virtualenv activate.fish runs commands from a path or prompt with a backslash before a quote

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.2, FishActivator inherits ViaTemplateActivator.quote, which uses POSIX shlex.quote even though fish interprets backslashes and single quotes differently. An attacker-influenced environment path, --prompt, or...