This vulnerability in Apache Airflow involves improper sanitization of user input passed via dag_run.conf to the BashOperator, leading to command injection (CWE-77). The flaw allows a UI user with limited privileges to escalate those privileges and execute arbitrary commands on the worker node. The vulnerability is documented as CVE-2026-30898 with a high CVSS score of 8.8, indicating network attack vector, low attack complexity, required privileges, no user interaction, and high impact on confidentiality, integrity, and availability. No official patch or remediation level has been published by Apache Software Foundation as of the publication date. Users should audit their DAG implementations for unsafe usage patterns derived from the vulnerable example.

Successful exploitation could allow an attacker with UI access to execute arbitrary code on Airflow worker nodes, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. The vulnerability is rated high severity (CVSS 8.8) due to its ability to escalate privileges and execute commands remotely without user interaction.

No official patch or remediation has been published by the vendor yet. Users should immediately review their DAGs for any usage of BashOperator that passes dag_run.conf or other user inputs without proper sanitization. Avoid using unsanitized user input in command execution contexts. Follow secure coding practices to neutralize special characters in inputs. Monitor the Apache Software Foundation advisories for updates on official fixes or guidance.