CVE-2026-40913
Apache Airflow: Import Errors API Leaks Unauthorized DAG Stack Traces via Incomplete Per-File RBAC Enforcement
Apache Airflow's public Import Errors API returns the raw parse-failure stack trace to any user with the `ImportError.can_read` permission when the failing file has no registered DAG. This happens when a file fails to parse before any DAG is defined, or when all of its previously registered DAGs are removed but the parse error remains. Users who should not see that file's details can read stack traces that may expose file paths and code. Users are advised to upgrade to Apache Airflow 3.4.0 or later, which restricts these stack traces to users with the new `IMPORT_ERRORS_ALL` permission.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: apacheAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Apache Airflow Apache Software Foundation apache-airflow-core
pypi |
≥ 0; < 3.4.0 (affected, semver)
Other versions: unaffected |
CNA: apache |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/apache/airflow/pull/69790CNA: apache · patch
- https://lists.apache.org/thread.html/t04l76dtx12m5cw8zfsnzo9r5rqnw0qvCNA: apache · vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/11/09/3ADP: CVE
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