pdm — security advisory

{
  "id": "3eadcf902795940d4f33f8e782b9dd6cfef2c682ab08694dc934fe8a7e927c70",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-47764",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-47764",
    "summary": "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.",
    "evidence": "osv:UBUNTU-CVE-2026-47764",
    "products": [
      {
        "name": {
          "value": "pdm",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.23.1-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.27.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.28.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.28.1-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pdm",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.20.1+ds1-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.23.1-4",
            "evidence": "/affected/1/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "UBUNTU-CVE-2026-47764",
      "aliases": [
        "UBUNTU-CVE-2026-47764"
      ],
      "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"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "pdm",
            "purl": "pkg:deb/ubuntu/pdm?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "2.23.1-4",
            "2.27.0-1",
            "2.28.0-1",
            "2.28.1-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47764.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python3-pdm",
                "binary_version": "2.28.1-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "pdm",
            "purl": "pkg:deb/ubuntu/pdm?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "2.20.1+ds1-2",
            "2.23.1-4"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47764.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python3-pdm",
                "binary_version": "2.23.1-4"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:58:56.542905579Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-47764"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-47764",
        "https://www.cve.org/CVERecord?id=CVE-2026-47764",
        "https://github.com/pdm-project/pdm/security/advisories/GHSA-78v8-vpjp-cjqh",
        "https://github.com/pdm-project/pdm/releases/tag/2.27.0"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-47764",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 359180,
  "published_at": "2026-08-04T19:16:00+00:00"
}