CVE-2026-43826: Apache Apache-Airflow-Providers-Opensearch

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

The OpenSearch logging provider, when configured with a `host` URL that embeds credentials (for example `https://user:password@server.example.com: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.

Affected products

• Apache Apache-Airflow-Providers-Opensearch: before 1.9.1 (fixed in 1.9.1)

Published 2026-05-11. Last modified 2026-06-17.