CVE-2026-43826 Apache Airflow Providers OpenSearch: OpenSearch task-log handler leaks credentials embedded in the host URL
An attacker with task-log read access can harvest OpenSearch backend credentials if they are embedded in the host URL configuration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-43826?
CVE-2026-43826 is a medium-severity vulnerability in Apache Airflow Providers OpenSearch, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The OpenSearch logging provider, when configured with a `host` URL that embeds credentials (for example `https://user:[email protected]:9200`), wrote the full host URL — including the embedded credentials — into task logs. Any user with task-log read permission could harvest the backend credentials. Users are advised to upgrade to `apache-airflow-providers-opensearch` 1.9.1 or later and, as a defense-in-depth measure, configure the backend credentials via a secret backend rather than embedding them in the `[opensearch] host` URL.
Weakness: CWE-532
Which versions are affected by CVE-2026-43826?
3 open source packages ship an affected version, including apache-airflow-providers-opensearch. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
apache-airflow-providers-opensearch PyPI | All versions | 1.9.1 |
apache-airflow-providers-opensearch PyPI | All versions | 1.9.1 |
apache-airflow-providers-opensearch PyPI | All versions | 1.9.1 |
Products include Apache Apache-Airflow-Providers-Opensearch.
How do I fix CVE-2026-43826?
Upgrade apache-airflow-providers-opensearch to 1.9.1 or later.
Is CVE-2026-43826 being exploited?
There is no known exploitation of CVE-2026-43826 in the wild and no public exploit code.
Sources
Also known as GHSA-xccp-97wp-3gjg, PYSEC-2026-23, UBUNTU-CVE-2026-43826.