Vulnerability Description
A bug in Apache Airflow's `/ui/dependencies` scheduling graph endpoint applied the caller's readable-Dag filter to the top-level serialized Dag key but still emitted referenced Dag IDs through the `dep.source` and `dep.target` fields of trigger / sensor dependency entries. An authenticated UI user with read permission on some Dags could enumerate the identifiers of other Dags they were not authorized to read by inspecting the dependency graph for trigger / sensor references. Affects deployments that rely on per-Dag read scoping to keep Dag identifiers private across teams. This is a residual gap in the fix for CVE-2026-28563, which filtered the top-level Dag key but did not propagate the filter into the trigger / sensor dep-source / dep-target fields. Users who already upgraded for CVE-2026-28563 should additionally upgrade to `apache-airflow` 3.3.0 or later to cover the residual trigger / sensor dependency leak.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Airflow | < 3.3.0 |
Related Weaknesses (CWE)
References
- https://github.com/apache/airflow/pull/67627Issue Tracking
- https://lists.apache.org/thread/wzc8nflg94rq6w8f5tvtlo0o3g4wjrflVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-28563Third Party Advisory
FAQ
What is CVE-2026-48891?
CVE-2026-48891 is a vulnerability with a CVSS score of 4.3 (MEDIUM). A bug in Apache Airflow's `/ui/dependencies` scheduling graph endpoint applied the caller's readable-Dag filter to the top-level serialized Dag key but still emitted referenced Dag IDs through the `de...
How severe is CVE-2026-48891?
CVE-2026-48891 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48891?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Airflow.