Description
pdm is a Python package and dependency manager supporting the latest PEP standards. Versions prior to 2.27.0 are vulnerable to path traversal through write_to_fs. InstallDestination.write_to_fs() in src/pdm/installers/installers.py overrides the base class to add symlink/hardlink support but replaces the safe _path_with_destdir() (which validates via Path.resolve() + is_relative_to()) with a bare os.path.join() that performs no path validation. A malicious wheel with traversal entries can write arbitrary files. This issue has been fixed in version 2.27.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| pdm-project | pdm | < 2.27.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | pdm | 2.27.0-1 | — |
| Debian 13 | pdm | No fix yet | — |
| Debian 12 | pdm | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | pdm | No fix yet | — |
| Ubuntu 26.04 LTS | pdm | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-pdm | 2.28.0-1.1 | openSUSE-SU-2026:11124-1 |
| openSUSE Leap 16.0 | python-pdm | 2.22.3-bp160.2.1 | openSUSE-SU-2026:21161-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | pdm | < 2.27.0 | 2.27.0 | GHSA-78v8-vpjp-cjqh |
Advisories 2
- openSUSE-SU-2026:21161-1 Security update for python-pdm SUSE / openSUSE Security Updates · Jun 30, 2026
- openSUSE-SU-2026:11124-1 python311-pdm-2.28.0-1.1 on GA media SUSE / openSUSE Security Updates · Jun 26, 2026