{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.0.1"
              },
              {
                "fixed": "0.7.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "a53d9f6d257f193ea5026ba4cd007d5ddeab968f"
            },
            {
              "fixed": "84f6ee0cf8eb9205cd06d38ba1986b43f1734779"
            }
          ],
          "repo": "https://github.com/apache/airflow",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "apache",
    "cwe_ids": [
      "CWE-352"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40948.json"
  },
  "details": "The Keycloak authentication manager in `apache-airflow-providers-keycloak` did not generate or validate the OAuth 2.0 `state` parameter on the login / login-callback flow, and did not use PKCE. An attacker with a Keycloak account in the same realm could deliver a crafted callback URL to a victim's browser and cause the victim to be logged into the attacker's Airflow session (login-CSRF / session fixation), where any credentials the victim subsequently stored in Airflow Connections would be harvestable by the attacker. Users are advised to upgrade `apache-airflow-providers-keycloak` to 0.7.0 or later.",
  "id": "CVE-2026-40948",
  "modified": "2026-08-04T11:31:15.895718756Z",
  "published": "2026-04-18T13:22:41.577Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/04/17/14"
    },
    {
      "type": "WEB",
      "url": "https://pypi.python.org"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40948.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/kc0odpr70hbqhdb9ksnz42fkqz2xld9q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40948"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/64114"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache Airflow Providers Keycloak: OAuth Login CSRF — Missing State Parameter in Keycloak Auth Manager"
}