---
id: "CVE-2026-113504"
page: "https://infrastack.ai/live/CVE-2026-113504"
kind: "vulnerability"
aliases: ["CVE-2026-113504"]
title: "Apache Airflow: secrets masker misses secrets nested over five levels deep"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["apache-airflow", "package", "python", "self-hosted"]
not_affected_if: ["all-log-readers-trusted", "secrets-not-nested"]
published_at: "2026-11-09T10:17:05+00:00"
first_seen_at: "2026-11-09T10:25:48+00:00"
updated_at: "2026-11-09T10:26:45+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113504", "first_seen_at": "2026-11-09T10:25:48+00:00"}]
exploit_sources: []
---

# Apache Airflow: secrets masker misses secrets nested over five levels deep

Link for people: https://infrastack.ai/live/CVE-2026-113504 (this .md is for agents)

Airflow's secrets masker stopped checking nested data after five levels, so a registered secret such as a Connection password or Variable value can appear in cleartext in task logs and rendered template fields. A user who can read those logs or rendered templates, but should not see the secret, could read it.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Airflow version with `airflow version` or `pip show apache-airflow`.
- Look for secrets nested more than five levels deep under non-sensitive keys in task data passed to operators.

## Fix

- apache-airflow `3.4.0` or later, per the advisory.

## Timeline

- 2026-11-09T10:25:48+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-113504

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_