{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:gitpython_project:gitpython:*:*:*:*:*:python:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.1.56"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e3221f1252346259513e14afeed32f0a203512a7"
            }
          ],
          "repo": "https://github.com/gitpython-developers/gitpython",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-p538-c434-8v24"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-88"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73621.json"
  },
  "details": "GitPython before 3.1.56 contains an argument injection vulnerability in the Commit.count() method, which forwards keyword arguments to 'git rev-list' without the check_unsafe_options guard present in the sibling iter_items method. An attacker who can control options passed to Commit.count (e.g., via an application that forwards a user-supplied options dict) can supply output=\u003cpath\u003e, causing 'git rev-list --output=\u003cpath\u003e' to open and truncate the target file to zero bytes before revision parsing. This allows destruction/blanking of an arbitrary file at the process's privilege level (no content control, 0-byte truncation).",
  "id": "CVE-2026-73621",
  "modified": "2026-09-05T03:31:04.418208151Z",
  "published": "2026-08-13T11:28:22.108Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73621.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-p538-c434-8v24"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73621"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/gitpython-before-arbitrary-file-truncation-via-commit-count"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "GitPython before 3.1.56 Arbitrary File Truncation via Commit.count"
}