Copier safe template has arbitrary filesystem read access via symlinks when _preserve_symlinks: false

ImpactCopier 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 turns out, a safe template can currently include arbitrary files/directories outside...

GHSA-4FQP-R85R-HXQH Copier safe template has arbitrary filesystem write access via directory symlinks when _preserve_symlinks: true

Impact 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 turns out, a safe template can currently write to arbitrary directories outside the...

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 ...

CVE-2025-55201

Copier library and CLI app for rendering project templates. Prior to 9.9.1, a safe template can currently read and write arbitrary files because Copier exposes a few pathlib.Path objects in the Jinja context which have unconstrained I/O methods. This effectively renders the security model w.r.t...

CVE-2025-55214 Copier safe template has filesystem write access outside destination path

Copier library and CLI app for rendering project templates. From 7.1.0 to before 9.9.1, 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-2025-55214 Copier safe template has filesystem write access outside destination path

Copier library and CLI app for rendering project templates. From 7.1.0 to before 9.9.1, 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...