# CVE-2026-101031: Apache Airflow: Shell command injection in the example_dag_decorator example Dag via an IPv6 zone identifier

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

The `example_dag_decorator` example Dag shipped with Apache Airflow validated an IP address fetched over HTTP with Python's `ipaddress` module and then placed it into a shell command. `ipaddress` accepts IPv6 zone identifiers containing arbitrary characters, so when example Dags are loaded (`load_examples` enabled), a user who can trigger that Dag with a custom `url` parameter could point it at a server whose response injects shell commands run on the worker. This is an incomplete fix for CVE-2025-54941; users who upgraded for CVE-2025-54941 should upgrade again. Users are advised to upgrade to apache-airflow 3.4.0 or later, or to disable example Dags (`load_examples = False`), which is recommended for production.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: apache) — https://github.com/apache/airflow/pull/73787

## Affected products and versions

- Apache Software Foundation / Apache Airflow (apache-airflow-core): ≥ 3.0.5; < 3.4.0 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-78

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/apache/airflow/pull/73787 (CNA: apache; patch)

- https://www.cve.org/CVERecord?id=CVE-2025-54941 (CNA: apache; related)

- https://lists.apache.org/thread.html/p53zxybld58wv722c7zxk0w8d2rnkfwk (CNA: apache; vendor-advisory)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-101031; retrieved 2026-11-09; source updated 2026-11-09

Revision: 733532a052c7b8f9a06600d6f4c4741d8462de4fcf9cddcdd6645308ae6c5134

Canonical: https://y2.dev/cve/CVE-2026-101031

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