CVE-2026-23968 Copier safe template has arbitrary filesystem read access via symlinks when _preserve_symlinks: false

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it...

CVE-2026-23968

CVE-2026-23968 affects Copier (library and CLI) prior to version 9.11.2. The issue lets a safe-looking template include arbitrary files/directories outside the local template via symlinks when _preserve_symlinks is false, effectively enabling read access to sensitive data. Version 9.11.2 patches ...