Medium [CVE-2026-49296] Apache Airflow: Per-DAG read bypass discloses co-located DAGs' source via GET /api/v2/dagSources/{dag_id}
This medium-severity Apache Software Foundation advisory covers CVE-2026-49296.
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Summary
Before apache-airflow 3.3.0, a user authorized to read one Dag could disclose the source of other Dags co-located in the same source file. `GET /api/v2/dagSources/{dag_id}` — and the equivalent Dag-source view in the UI — returned the entire source file without redacting Dags the caller was not authorized to read, bypassing per-DAG read authorization.
Deployments that co-locate multiple Dags in a single file and rely on per-DAG access control to limit source visibility are affected; single-Dag-per-file deployments are not. Upgrade to apache-airflow 3.3.0 or later.
- Apache Airflow 3.0.0 before 3.3.0
Official advisory · high-confidence parse· fetched 4 months ago·verify at source
Mitigation checklist
- Deployments that co-locate multiple Dags in a single file and rely on per-DAG access control to limit source visibility are affected; single-Dag-per-file deployments are not.
- Upgrade to apache-airflow 3.3.0 or later.
Official advisory · high-confidence parse· fetched 4 months ago·verify at source
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