CVE-2026-23968
CVE-2026-23968 · Copier safe template has arbitrary filesystem read access via symlinks when _preserve_symlinks: false
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 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 Copier's default setting). Version 9.11.2 patches the issue.
CVSS 6.8 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: python
Affected products and versions
copier
- Versions
- < 9.11.2: Affected
No fix published
copier PyPI
- Versions
- 2.0.0
- 2.0.1
- 2.1.0
- 2.2.1
- 2.2.2
- 2.2.3
- 2.3
- 2.3.1
- 2.3.2
- 2.3.3
- 2.4.0
- 2.4.1
- 2.4.2
- 2.5.0
- 2.5.1
- 3.0.0a3
- 3.0.0a5
- 3.0.0a6
- 3.0.0a7
- 3.0.0a8
- 3.0.0b1
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.1.0
- 3.2.0
- 4.0.0
- 4.0.1
- 4.0.2
- 4.1.0
- 5.0.0
- 5.1.0
- 6.0.0
- 6.0.0a0
- 6.0.0a2
- 6.0.0a3
- 6.0.0a4
- 6.0.0a5
- 6.0.0a6
- 6.0.0a7
- 6.0.0a9
- 6.0.0b0
- 6.1.0
- 6.2.0
- 7.0.1
- 7.1.0
- 7.1.0a0
- 7.2.0
- 8.0.0
- 8.1.0
- 8.2.0
- 8.3.0
- 9.0.1
- 9.1.0
- 9.1.1
- 9.10.0
- 9.10.1
- 9.10.2
- 9.10.3
- 9.11.0
- 9.11.1
- 9.2.0
- 9.3.0
- 9.3.1
- 9.4.0
- 9.4.1
- 9.5.0
- 9.6.0
- 9.7.0
- 9.7.1
- 9.8.0
- 9.9.0
- 9.9.1
- Affected ranges
- ECOSYSTEM: < 9.11.2
Update to 9.11.2