CVE-2026-48891

MediumCVSS 4.3

Published: 07/07/2026(UTC)Updated: 09/07/2026(UTC)Translated: 10/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.36%

28th percentile - higher than 28% of all known CVEs

Summary

A bug in Apache Airflow's `/ui/dependencies` scheduling graph endpoint leaks Dag IDs through the `dep.source` and `dep.target` fields of trigger and sensor dependency entries. An authenticated UI user with read permission on some Dags can enumerate identifiers of other Dags they are not authorized to read. This is a residual gap in the fix for CVE-2026-28563, which filtered the top-level Dag key but not the trigger/sensor dependency fields.

Risk Assessment

Organizations relying on per-Dag read scoping to keep Dag identifiers private across teams are at risk of identifier leakage. This enables unauthorized reconnaissance of workflow structure and dependencies, potentially leading to further attacks.

Recommendation

Upgrade Apache Airflow to version 3.3.0 or later immediately, which includes the complete fix eliminating Dag ID leakage through trigger and sensor dependencies. This applies even to users who already applied the fix for CVE-2026-28563.

Original NVD description (English source)

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.