CVE-2026-40861 Apache Airflow: Arbitrary File Read via Log Symlink following in FileTaskHandler

A Dag author could either a create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process read-path attack — e.g. /etc/passwd or airflow.cfg or b supply a taskid containing .. sequences accepted by the Task SDK's KEYREGEX write-path attack, and...

CVE-2026-40861

CVE-2026-40861 affects Apache Airflow, specifically the FileTaskHandler used for task logs. A Dag author can cause log path resolution to escape the configured base_log_folder via two patterns: (a) creating a symlink in the task log directory to an arbitrary file readable by the API server (read-...