2026-04-02 18:09:16
GitHub_M
PUBLISHED
Copier is a library and CLI app for rendering project templates. Prior to version 9.14.1, Copiers _external_data feature allows a template to load YAML files using template-controlled paths. If untrusted templates are in scope, a malicious template can read attacker-chosen YAML-parseable local files that are accessible to the user running Copier and expose their contents in rendered output. This issue has been patched in version 9.14.1.