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CVE-2026-47764— pdm: Path traversal in wheel installation via overridden write_to_fs

Quick assessment

Affected
pdm-project pdm
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PDM是PDM组织的一款产品数据管理解决方案。 PDM 2.27.0之前版本存在路径遍历漏洞，该漏洞源于write_to_fs函数中路径验证不当，用裸os.path.join替换了安全的_path_with_destdir()，可能导致恶意wheel写入任意文件。

CVSS 8.4 · High EPSS 0.20% · P8

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
pdm-project pdm < 2.27.0 affected
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I. Basic Information for CVE-2026-47764

Vulnerability Information
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Vulnerability Title
pdm: Path traversal in wheel installation via overridden write_to_fs
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
PDM 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PDM是PDM组织的一款产品数据管理解决方案。 PDM 2.27.0之前版本存在路径遍历漏洞，该漏洞源于write_to_fs函数中路径验证不当，用裸os.path.join替换了安全的_path_with_destdir()，可能导致恶意wheel写入任意文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pdm-project pdm < 2.27.0 -

II. Public POCs for CVE-2026-47764

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7757 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-47764

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Vendor Advisories for CVE-2026-47764 (1)

Vendor Pages for CVE-2026-47764 (1)

Same Patch Batch · pdm-project · 2026-08-04 · 3 CVEs total

CVE-2026-47781 8.4 HIGH pdm: Project-Controlled `.pdm-plugins` Content Executes Before CLI Parsing
CVE-2026-47763 6.8 MEDIUM pdm: Project-Local State and Config Writes Follow Symlinks

IV. Related Vulnerabilities

Same product: pdm
Same vendor: pdm-project
Same weakness: CWE-22

V. Comments for CVE-2026-47764

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