Security Advisory

CVE-2026-23968

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-01-21 22:13:25

Last updated 2026-01-22 16:49:32

Assigner GitHub_M

State PUBLISHED

Description

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that its safe to generate a project from a safe template, i.e. one that doesnt 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 the local template clone location by using symlinks along with `_preserve_symlinks: false` (which is Copiers default setting). Version 9.11.2 patches the issue.

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