要点
- CVE-2026-47764 是影响 pdm 的高危 (CVSS 8.4)漏洞。
- 未来 30 天内被利用的概率（EPSS）：0.20%，高于 9.4% 的漏洞。
- 修复：升级到 2.27.0 或更高版本。
| Package | Affected versions | Patched versions |
|---|
| pdm PyPI | < 2.27.0
| 2.27.0
|
Description
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.
NVD 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.
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