Security advisory

{
  "id": "7a66a9aa1e753bb597b43de123f0bf1bd7d61f413674677c4403048135575d64",
  "url": "https://osv.dev/vulnerability/CVE-2020-17526",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-17526",
    "summary": "Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.",
    "evidence": "osv:CVE-2020-17526",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-17526",
      "aliases": [
        "BIT-airflow-2020-17526",
        "CVE-2020-17526",
        "GHSA-7mx5-x372-xh87",
        "PYSEC-2020-22"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/airflow",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6e6a49e2bb2661e9e785ab02ae94fda72d6759d5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.10.14"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "constraints-1.10.13",
            "constraints-1.10.12",
            "constraints-1.10.11",
            "constraints-1.10.9",
            "constraints-1.10.8",
            "constraints-1.10.7",
            "constraints-1.10.6",
            "constraints-1.10.5",
            "constraints-1.10.4",
            "constraints-1.10.3",
            "constraints-1.10.2",
            "constraints-1.10.10",
            "constraints-1.10.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-17526.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:22.260514502Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352%40%3Cannounce.apache.org%3E",
        "https://lists.apache.org/thread.html/rbeeb73a6c741f2f9200d83b9c2220610da314810c4e8c9cf881d47ef%40%3Cusers.airflow.apache.org%3E"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-17526",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430637,
  "published_at": "2020-12-21T17:15:12.507+00:00"
}