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pdm: Project-Controlled `.pdm-plugins` Content Executes Before CLI Parsing

Type: advisorySources: OSV

PDM is a Python package and dependency manager. In versions up to and including 2.26.9, PDM automatically loads project-local plugins from a .pdm-plugins directory during initialization, allowing an attacker-controlled file in an untrusted repository checkout to execute arbitrary Python code before any command is parsed. This happens because load_plugins() runs during Core.init() and adds .pdm-plugins via site.addsitedir(), which processes .pth files and immediately executes any line beginning with import, so the code runs with the privileges of the user invoking pdm and even a benign command such as pdm --version triggers it (making the impact strongest in CI, automation, and privileged contexts). The issue is fixed in version 2.27.0.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-47781
Confirmed fixed CVEs
Not specified
Updated in this feed
8 Nov 2026, 00:18 UTC · Revision 1

Source evidence

pdm: Project-Controlled `.pdm-plugins` Content Executes Before CLI Parsing

core-osv · Original source

Published 4 Aug 2026, 18:42 UTC

PDM is a Python package and dependency manager. In versions up to and including 2.26.9, PDM automatically loads project-local plugins from a .pdm-plugins directory during initialization, allowing an attacker-controlled file in an untrusted repository checkout to execute arbitrary Python code before any command is parsed. This happens because load_plugins() runs during Core.init() and adds .pdm-plugins via site.addsitedir(), which processes .pth files and immediately executes any line beginning with import, so the code runs with the privileges of the user invoking pdm and even a benign command such as pdm --version triggers it (making the impact strongest in CI, automation, and privileged contexts). The issue is fixed in version 2.27.0.

osv:CVE-2026-47781
Complete source record
{
  "id": "10545f606c45bebbe1538dba9fa10b605cf3188bbc24651f2a296270f71f0ecb",
  "url": "https://osv.dev/vulnerability/CVE-2026-47781",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "pdm: Project-Controlled `.pdm-plugins` Content Executes Before CLI Parsing",
    "summary": "PDM is a Python package and dependency manager. In versions up to and including 2.26.9, PDM automatically loads project-local plugins from a .pdm-plugins directory during initialization, allowing an attacker-controlled file in an untrusted repository checkout to execute arbitrary Python code before any command is parsed. This happens because load_plugins() runs during Core.init() and adds .pdm-plugins via site.addsitedir(), which processes .pth files and immediately executes any line beginning with import, so the code runs with the privileges of the user invoking pdm and even a benign command such as pdm --version triggers it (making the impact strongest in CI, automation, and privileged contexts). The issue is fixed in version 2.27.0.",
    "evidence": "osv:CVE-2026-47781",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-47781",
      "aliases": [
        "CVE-2026-47781",
        "GHSA-qq6c-99pv-prvf",
        "PYSEC-2026-2863"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pdm-project/pdm",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "09c95b7842844f4e857c88f669e1c666db405c71"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.27.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "09c95b7842844f4e857c88f669e1c666db405c71"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "2.27.0"
                  }
                ]
              }
            }
          ],
          "versions": [
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47781.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.947506125Z",
      "provider": "osv",
      "references": [
        "https://github.com/pdm-project/pdm/releases/tag/2.27.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47781.json",
        "https://github.com/pdm-project/pdm/security/advisories/GHSA-qq6c-99pv-prvf",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-47781"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-829",
          "CWE-94"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47781.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-47781",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 520909,
  "published_at": "2026-08-04T18:42:23.036+00:00"
}