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.
Metrics
Affected Vendors & Products
References
History
Tue, 02 Jun 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:* |
Tue, 02 Jun 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
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Mon, 01 Jun 2026 11:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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Mon, 01 Jun 2026 11:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Apache
Apache airflow |
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| Vendors & Products |
Apache
Apache airflow |
Mon, 01 Jun 2026 09:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Apache Airflow: Arbitrary File Read via Log Symlink following in FileTaskHandler | |
| Weaknesses | CWE-59 | |
| References |
|
Status: PUBLISHED
Assigner: apache
Published: 2026-06-01T07:55:37.566Z
Updated: 2026-06-02T16:42:26.285Z
Reserved: 2026-04-15T13:58:24.192Z
Link: CVE-2026-40861
Updated: 2026-06-01T09:52:20.189Z
Status : Analyzed
Published: 2026-06-01T09:16:17.893
Modified: 2026-06-02T18:49:39.063
Link: CVE-2026-40861
No data.