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.
Published: 2026-08-04
Score: 8.4 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-78v8-vpjp-cjqh PDM wheel installation leads to Path Traversal via overridden write_to_fs
History

Wed, 05 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 05 Aug 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Pdm-project
Pdm-project pdm
Vendors & Products Pdm-project
Pdm-project pdm

Tue, 04 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
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.
Title pdm: Path traversal in wheel installation via overridden write_to_fs
Weaknesses CWE-22
References
Metrics cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-05T13:47:02.050Z

Reserved: 2026-05-19T22:36:16.881Z

Link: CVE-2026-47764

cve-icon Vulnrichment

Updated: 2026-08-05T13:46:57.187Z

cve-icon NVD

Status : Received

Published: 2026-08-04T19:16:51.093

Modified: 2026-08-05T15:16:50.377

Link: CVE-2026-47764

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-05T10:19:11Z

Weaknesses