---
id: "CVE-2026-111455"
page: "https://infrastack.ai/live/CVE-2026-111455"
kind: "vulnerability"
aliases: ["CVE-2026-111455"]
title: "Apache Airflow: connection test can overwrite another user's connection"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["apache-airflow", "python", "runtime", "self-hosted"]
not_affected_if: ["default-config", "test-connection-disabled"]
published_at: "2026-11-09T10:17:05+00:00"
first_seen_at: "2026-11-09T10:25:48+00:00"
updated_at: "2026-11-09T10:26:46+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111455", "first_seen_at": "2026-11-09T10:25:48+00:00"}]
exploit_sources: []
---

# Apache Airflow: connection test can overwrite another user's connection

Link for people: https://infrastack.ai/live/CVE-2026-111455 (this .md is for agents)

Apache Airflow's asynchronous connection test checked permissions only when queued, so a user with create-only rights can overwrite a connection someone else created in the meantime. The overwrite happens when a test completes with commit_on_success.

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

## How to check

- Check whether `[core] test_connection` is enabled in airflow.cfg or the `AIRFLOW__CORE__TEST_CONNECTION` environment variable; only enabled deployments are affected.
- Check the installed version with `airflow version` or `pip show apache-airflow`; versions before `3.4.0` are affected.

## Fix

- apache-airflow: upgrade to `3.4.0` or later

## Timeline

- 2026-11-09T10:25:48+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111455

## From the sources

Apache Airflow's asynchronous connection test checked permissions when the test was queued — only create permission when the connection ID did not exist yet — but, when the test completed with `commit_on_success`, wrote the tested connection under that ID. A user allowed to create but not edit connections could overwrite a connection someone else had created in the meantime. Only deployments that enable the non-default `[core] test_connection` setting are affected. Users are advised to upgrade to apache-airflow 3.4.0 or later.

---

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