PDM wheel installation leads to Path Traversal via overridden 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. Same class as Poetry CVE-2026-34591. Fix ready at: https://github.com/pdm-project/pdm/pull/3787.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | pdm | < 2.27.0 | 2.27.0 |
References
- https://github.com/pdm-project/pdm/security/advisories/GHSA-78v8-vpjp-cjqh
- https://github.com/pdm-project/pdm/pull/3787
- https://github.com/pdm-project/pdm
- https://github.com/pdm-project/pdm/releases/tag/2.27.0
- https://pypi.org/project/pdm
- https://github.com/advisories/GHSA-78v8-vpjp-cjqh
- https://nvd.nist.gov/vuln/detail/CVE-2026-47764
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-22- Platform
- Python (PyPI)
- Package
pdm- Disclosed
- 10.06.2026
- Updated
- 11.10.2026 14:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2861 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-78v8-vpjp-cjqh - CC BY 4.0
Vulnerability history: pdm
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 10.2023 06.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Medium 1
Disclosures per year
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 3
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PDM wheel installation leads to Path Traversal via overridden write_to_fs this entry
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