{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:copier-org:copier:*:*:*:*:*:python:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "9.14.1"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "f6ac94689a0a672ae1a53d442740fb85dbd4004f"
            },
            {
              "fixed": "cb80a3ffc9c3787de3ed837e04ca29a0ff8ca3df"
            }
          ],
          "repo": "https://github.com/copier-org/copier",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-85v3-4m8g-hrh6"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34726.json"
  },
  "details": "Copier is a library and CLI app for rendering project templates. Prior to version 9.14.1, Copier's _subdirectory setting is documented as the subdirectory to use as the template root. However, the current implementation accepts parent-directory traversal such as .. and uses it directly when selecting the template root. As a result, a template can escape its own directory and make Copier render files from the parent directory without --UNSAFE. This issue has been patched in version 9.14.1.",
  "id": "CVE-2026-34726",
  "modified": "2026-07-08T05:38:13.306832019Z",
  "published": "2026-04-02T18:07:35.517Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/copier-org/copier/releases/tag/v9.14.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34726.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/copier-org/copier/security/advisories/GHSA-85v3-4m8g-hrh6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34726"
    },
    {
      "type": "FIX",
      "url": "https://github.com/copier-org/copier/commit/cb80a3ffc9c3787de3ed837e04ca29a0ff8ca3df"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Copier `_subdirectory` allows template root escape via parent-directory traversal"
}