Aggregates CVE and security vulnerability intelligence across all copier-org-related products, including CVSS, EPSS, publication dates, and vulnerability intelligence data.
Historical issues mainly involve vendor risk path handling and related problems; some flaws may lead to vendor impact file overwrite, affecting vendor surface software deployment scenarios.
| CVE | Summary | Source | Max CVSS | EPSS % | Published | Updated |
|---|---|---|---|---|---|---|
| CVE-2026-34730 | Copier is a library and CLI app for rendering project templates. Prior to version 9.14.1, Copier's _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. | [email protected] | 5.5 | 0.29% | 2026-04-02 | 2026-04-03 |
| CVE-2026-34726 | Copier is a library and CLI app for rendering project templates. Prior to version 9.14.1, Copier's _subdirectory setting is documented as the subdirectory to use as the template root. However, the current implementation accepts parent-directory traversal such as .. and uses it directly when selecting the template root. As a result, a template can escape its own directory and make Copier render files from the parent directory without --UNSAFE. This issue has been patched in version 9.14.1. | [email protected] | 4.4 | 0.38% | 2026-04-02 | 2026-04-03 |
| CVE-2026-23986 | 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 write to arbitrary directories outside the destination path by using directory a symlink along with `_preserve_symlinks: true` and a generated directory structu | [email protected] | 6.9 | 0.22% | 2026-01-21 | 2026-02-02 |
| CVE-2026-23968 | 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 defaul | [email protected] | 6.8 | 0.20% | 2026-01-21 | 2026-02-02 |