pdm: Project-Local State and Config Writes Follow Symlinks (CVE-2026-47763) | HOL Guard CVE

Medium · CVSS 6.8CVE-2026-47763GHSA-GHQ2-5C67-FPRM

pdm: Project-Local State and Config Writes Follow Symlinks

Answer in brief

CVE-2026-47763 records a Medium severity (CVSS 6.8) vulnerability in pdm: Project-Local State and Config Writes Follow Symlinks. The current sources do not mark it as known exploited. The current feed maps pdm-project/pdm (generic), pdm (pip). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 4, 2026Updated Sep 8, 2026Source checked Sep 17, 2026First seen by HOL Jun 11, 2026Material review Sep 8, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 6.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps pdm-project/pdm (generic), pdm (pip). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
pdm-project/pdmgeneric	< 2.27.0	Not reported
pdmpip	<2.27.0	2.27.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for pdm-project/pdm, pdm.
Review the reported fix. Update pdm to 2.27.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 11, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.