PDM wheel installation leads to Path Traversal via overridden write_to_fs
- When
- Where
- Global (internet)
- Category
- cyber_advisory · pip
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.
Sources
- GitHub Advisory Database ↗ · first seen 2026-06-10 20:33 UTC
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