{"id":"PYSEC-2026-3986","details":"Apache Airflow Apache Kafka provider versions 1.15.0 before 2.0.0 resolve dotted-path strings found in a Kafka connection's `extra` field into Python callables via `import_string`, with no allowlist, and hand them to the confluent-kafka client which invokes them. Deployments that have enabled the Kafka event producer — `dag_run_events_enabled` or `task_instance_events_enabled`, both disabled by default — build that client inside the scheduler process, so a user whose only privilege is editing Airflow connections gains arbitrary code execution in the control plane; the Airflow security model limits connection-configuration users to code execution on workers, not the scheduler. Deployments using Google Managed Kafka are not affected, because that code path overwrites any user-supplied `oauth_cb`; plain brokers and Amazon MSK are exposed. Users are recommended to upgrade to apache-airflow-providers-apache-kafka 2.0.0 or later, which adds an allowlist configuration option for connection-string callbacks.","aliases":["CVE-2026-86792"],"modified":"2026-09-19T23:00:02.763316321Z","published":"2026-09-16T10:16:55.060Z","references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2026/09/15/15"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/jl4gpok02313yh3rvtvj8qbo11c6zpr2"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/jl4gpok02313yh3rvtvj8qbo11c6zpr2?users@airflow.apache.org"},{"type":"FIX","url":"https://github.com/apache/airflow/pull/72208"}],"affected":[{"package":{"name":"apache-airflow-providers-apache-kafka","ecosystem":"PyPI","purl":"pkg:pypi/apache-airflow-providers-apache-kafka"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.15.0"},{"fixed":"2.0.0"}]}],"versions":["1.15.0","1.15.1","1.15.1rc1","1.15.1rc2","1.16.0","1.16.0rc1","2.0.0rc1"],"ecosystem_specific":{},"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/apache-airflow-providers-apache-kafka/PYSEC-2026-3986.yaml"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}