Apache Airflow has a Link Following issue
Medium6.5CVE-2026-40861 · Published Jun 1, 2026 · updated Jul 9, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| apache-airflow PyPI | < 3.2.2 | 3.2.2 |
Details and references
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.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-59
- Also known as
- BIT-airflow-2026-40861, CVE-2026-40861, PYSEC-2026-181
More Apache Airflow advisories
All Apache Airflow| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jun 1 | Apache Airflow: Incomplete redaction allowlist exposes secrets in Connection `extra` to read-permitted users CVE-2026-45192Medium6.5fixed in 3.2.2 | Medium6.5 | 3.2.2 |
| Jun 1 | Apache Airflow: Authenticated users can bypass the `is_safe_url` check CVE-2026-40961High7.2fixed in 3.2.2 | High7.2 | 3.2.2 |
| Jun 1 | Apache Airflow has a Sensitive Cookie in HTTPS Session Without 'Secure' Attribute CVE-2026-41017Medium5.9fixed in 3.2.2 | Medium5.9 | 3.2.2 |
| Jun 1 | Apache Airflow has an Improper Authorization issue CVE-2026-40963Low3.1fixed in 3.2.2 | Low3.1 | 3.2.2 |
| Jun 1 | Apache Airflow has a Missing Authorization issue CVE-2026-41014Medium4.3fixed in 3.2.2 | Medium4.3 | 3.2.2 |
| Jun 1 | Apache Airflow Vulnerable to Deserialization of Untrusted Data CVE-2026-45360High7.3fixed in 3.2.2 | High7.3 | 3.2.2 |