# CVE-2026-113504: Apache Airflow: Secrets masker: pattern-based masking bounded at depth 5 returns deeply-nested registered secrets in cleartext

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

Apache Airflow's secrets masker stopped descending into nested structures after five levels, so a secret registered with the masker — for example a Connection password or a Variable value — that appeared more than five containers deep under non-sensitive keys was shown in cleartext in task logs and rendered template fields. A user who can read task logs or rendered templates, but is not meant to see those secrets, could read them. Users are advised to upgrade to apache-airflow 3.4.0 or later.

## 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/73793

## Affected products and versions

- Apache Software Foundation / Apache Airflow (apache-airflow-core): ≥ 0; < 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-497

## Exploit evidence

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

## References

- https://github.com/apache/airflow/pull/73793 (CNA: apache; patch)

- https://lists.apache.org/thread.html/c0bzrpq913qh7srwdmx0smvt1tgvthrr (CNA: apache; vendor-advisory)

- http://www.openwall.com/lists/oss-security/2026/11/09/19 (ADP: CVE)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-113504; retrieved 2026-11-09; source updated 2026-11-09

Revision: 7ed9c318638629e4bf2c2d30542a35e89ea5b5fdff37656fd7caeb611b957b3e

Canonical: https://y2.dev/cve/CVE-2026-113504

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