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 `task_id` containing `..` sequences accepted by the Task SDK's `KEY_REGEX` (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`, leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared with the API server. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled paths cannot reach the API server's filesystem.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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 `task_id` containing `..` sequences accepted by the Task SDK's `KEY_REGEX` (write-path attack),
    and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`,
    leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared
    with the API server. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-
    depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled
    paths cannot reach the API server's filesystem. (CVE-2026-40861)

ID	Name	Product	Family	Type	Severity
457137	Echo: apache-airflow: security update to 3.2.2	Tenable Cloud Security	Echo Local Security Checks	Local	medium
457137	Echo: apache-airflow: security update to 3.2.2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
444732	SCA: security update for apache-airflow (GHSA-89cj-xrpx-j79m)	Tenable Cloud Security	SCA Checks	Local	medium
444732	SCA: security update for apache-airflow (GHSA-89cj-xrpx-j79m)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-40861

medium

Tenable Plugins

medium

medium

medium

medium