CVSS 3.1
4.4 mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:NCVE-2026-34726
Medium (4.4) in copier-org copier. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in copier 9.14.1.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-31)
- CWE
- CWE-22
- Published
- Modified
- Record from
- the NVD, synced
Affected
- copier-org:copier
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-85v3-4m8g-hrh6 | PyPI | copier | <9.14.1 | 9.14.1 |
| PYSEC-2026-2134 | PyPI | copier | <9.14.1 | 9.14.1 |