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CVE-2026-47763

CVE-2026-47763 · pdm: Project-Local State and Config Writes Follow Symlinks

This page contains facts from public vulnerability sources. Check the original advisory before updating.

pdm is a Python package and dependency manager supporting the latest PEP standards. In versions prior to 2.27.0, pdm writes several project-local state or configuration files without symlink protection. If a malicious repository places those files as symlinks, local PDM operations can overwrite the symlink targets. This creates an arbitrary file clobber primitive relative to the privileges of the invoking user. Config.__init__() resolves the project-local pdm.toml path and _save_config() writes to the resolved target. If PROJECT_ROOT/pdm.toml is a symlink to another file, pdm config -l ... updates the target file instead of refusing the write. The same general problem exists for other project-local persistence paths that are written directly with no lstat / O_NOFOLLOW protection. For the pdm.toml PoC specifically, the target file must already contain parseable TOML. Otherwise the load step fails before the write path is reached. That parser constraint does not apply to the .pdm-python or .python-version sinks. This issue has been fixed in version 2.27.0.

CVSS 6.8 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • pdm

    Versions
    • < 2.27.0: Affected

    No fix published

  • pdm Debian:12

    Versions
    • 2.2.1+ds1-1
    • 2.2.1+ds1-2
    • 2.20.0.post1+ds1-1
    • 2.20.0.post1+ds1-2
    • 2.20.1+ds1-1
    • 2.20.1+ds1-2
    • 2.23.1-1
    • 2.23.1-2
    • 2.23.1-3
    • 2.23.1-4
    • 2.26.2-1
    • 2.26.6-1
    • 2.27.0-1
    • 2.28.0-1
    • 2.28.1-1
    • 2.29.0-1
    • 2.29.2-1
    • 2.29.3-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • pdm Debian:13

    Versions
    • 2.20.1+ds1-2
    • 2.23.1-1
    • 2.23.1-2
    • 2.23.1-3
    • 2.23.1-4
    • 2.26.2-1
    • 2.26.6-1
    • 2.27.0-1
    • 2.28.0-1
    • 2.28.1-1
    • 2.29.0-1
    • 2.29.2-1
    • 2.29.3-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • pdm Debian:14

    Versions
    • 2.20.1+ds1-2
    • 2.23.1-1
    • 2.23.1-2
    • 2.23.1-3
    • 2.23.1-4
    • 2.26.2-1
    • 2.26.6-1
    Affected ranges
    • ECOSYSTEM: < 2.27.0-1

    Update to 2.27.0-1

  • pdm PyPI

    Versions
    • 0.0.0
    • 0.0.1
    • 0.0.3
    • 0.0.4
    • 0.0.5
    • 0.0.6
    • 0.1.0
    • 0.1.1
    • 0.1.2
    • 0.10.0
    • 0.10.1
    • 0.10.2
    • 0.11.0
    • 0.12.0
    • 0.12.1
    • 0.12.2
    • 0.12.3
    • 0.2.0
    • 0.2.1
    • 0.2.2
    • 0.2.3
    • 0.2.4
    • 0.2.5
    • 0.2.6
    • 0.3.0
    • 0.3.1
    • 0.3.2
    • 0.4.0
    • 0.4.1
    • 0.4.2
    • 0.5.0
    • 0.6.0
    • 0.6.1
    • 0.6.2
    • 0.6.3
    • 0.6.4
    • 0.6.5
    • 0.7.0
    • 0.7.1
    • 0.8.0
    • 0.8.1
    • 0.8.2
    • 0.8.3
    • 0.8.4
    • 0.8.5
    • 0.8.6
    • 0.8.7
    • 0.9.0
    • 0.9.1
    • 0.9.2
    • 1.0.0
    • 1.0.0b0
    • 1.0.0b2
    • 1.1.0
    • 1.10.0
    • 1.10.1
    • 1.10.2
    • 1.10.3
    • 1.11.0
    • 1.11.1
    • 1.11.2
    • 1.11.3
    • 1.12.0
    • 1.12.1
    • 1.12.2
    • 1.12.3
    • 1.12.4
    • 1.12.5
    • 1.12.6
    • 1.12.7
    • 1.12.8
    • 1.13.0
    • 1.13.0.post0
    • 1.13.1
    • 1.13.2
    • 1.13.3
    • 1.13.4
    • 1.13.5
    • 1.13.6
    • 1.14.0
    • 1.14.1
    • 1.15.0
    • 1.15.1
    • 1.15.2
    • 1.15.3
    • 1.15.4
    • 1.15.5
    • 1.2.0
    • 1.2.0.post1
    • 1.3.0
    • 1.3.1
    • 1.3.2
    • 1.3.3
    • 1.3.4
    • 1.4.0
    • 1.4.1
    • 1.4.2
    • 1.4.3
    • 1.4.4
    • 1.4.5
    • 1.5.0
    • 1.5.0b0
    • 1.5.0b1
    • 1.5.1
    • 1.5.2
    • 1.5.3
    • 1.6.0
    • 1.6.1
    • 1.6.2
    • 1.6.3
    • 1.6.4
    • 1.7.0
    • 1.7.1
    • 1.7.2
    • 1.8.0
    • 1.8.1
    • 1.8.2
    • 1.8.3
    • 1.8.4
    • 1.8.5
    • 1.9.0
    • 2.0.0
    • 2.0.0a1
    • 2.0.0b1
    • 2.0.0b2
    • 2.0.1
    • 2.0.2
    • 2.0.3
    • 2.1.0
    • 2.1.1
    • 2.1.2
    • 2.1.3
    • 2.1.4
    • 2.1.5
    • 2.10.0
    • 2.10.1
    • 2.10.2
    • 2.10.3
    • 2.10.4
    • 2.11.0
    • 2.11.1
    • 2.11.2
    • 2.12.0
    • 2.12.1
    • 2.12.2
    • 2.12.3
    • 2.12.4
    • 2.13.0
    • 2.13.1
    • 2.13.2
    • 2.13.3
    • 2.14.0
    • 2.15.0
    • 2.15.1
    • 2.15.2
    • 2.15.3
    • 2.15.4
    • 2.16.0
    • 2.16.1
    • 2.17.0
    • 2.17.1
    • 2.17.2
    • 2.17.3
    • 2.18.0
    • 2.18.1
    • 2.18.2
    • 2.19.0
    • 2.19.0a0
    • 2.19.1
    • 2.19.2
    • 2.19.3
    • 2.2.0
    • 2.2.1
    • 2.20.0
    • 2.20.0.post1
    • 2.20.1
    • 2.21.0
    • 2.22.0
    • 2.22.1
    • 2.22.2
    • 2.22.3
    • 2.22.4
    • 2.23.0
    • 2.23.1
    • 2.24.0
    • 2.24.1
    • 2.24.2
    • 2.25.0
    • 2.25.1
    • 2.25.2
    • 2.25.3
    • 2.25.4
    • 2.25.5
    • 2.25.6
    • 2.25.7
    • 2.25.8
    • 2.25.9
    • 2.26.0
    • 2.26.1
    • 2.26.2
    • 2.26.3
    • 2.26.4
    • 2.26.5
    • 2.26.6
    • 2.26.7
    • 2.26.8
    • 2.26.9
    • 2.3.0
    • 2.3.1
    • 2.3.2
    • 2.3.3
    • 2.3.4
    • 2.4.0
    • 2.4.1
    • 2.4.2
    • 2.4.3
    • 2.4.4
    • 2.4.5
    • 2.4.6
    • 2.4.7
    • 2.4.8
    • 2.4.9
    • 2.5.0
    • 2.5.0b0
    • 2.5.1
    • 2.5.2
    • 2.5.3
    • 2.5.4
    • 2.5.5
    • 2.5.6
    • 2.6.0
    • 2.6.1
    • 2.7.0
    • 2.7.1
    • 2.7.2
    • 2.7.3
    • 2.7.4
    • 2.8.0
    • 2.8.0a0
    • 2.8.0a1
    • 2.8.0a2
    • 2.8.1
    • 2.8.2
    • 2.9.0
    • 2.9.1
    • 2.9.2
    • 2.9.3
    Affected ranges
    • ECOSYSTEM: < 2.27.0

    Update to 2.27.0

  • pdm Ubuntu:26.10

    Versions
    • 2.23.1-4
    • 2.27.0-1
    • 2.28.0-1
    • 2.28.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • pdm Ubuntu:26.04:LTS

    Versions
    • 2.20.1+ds1-2
    • 2.23.1-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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