CVE-2026-86792
HighCVSS 8.8Exploitation Probability (EPSS)
Elevated risk54th percentile - higher than 54% of all known CVEs
Summary
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 with the Kafka event producer enabled 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. Deployments using Google Managed Kafka are not affected because that code path overwrites any user-supplied oauth_cb.
Risk Assessment
A user with only connection-editing privileges may gain arbitrary code execution in the scheduler process, breaking the Airflow security model. The risk affects deployments with dag_run_events_enabled or task_instance_events_enabled enabled and plain brokers or Amazon MSK.
Recommendation
Upgrade apache-airflow-providers-apache-kafka to version 2.0.0 or later, which adds an allowlist configuration option for connection-string callbacks. Until patched, restrict privileges for editing Airflow connections.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

