Information disclosure in Apache Apache-Airflow-Providers-Elasticsearch
CVE-2026-41018
The Elasticsearch 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-elasticsearch` 6.5.3 or later and, as a defense-in-depth measure, configure the backend credentials via a secret backend rather than embedding them in the `[elasticsearch] host` URL.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (49.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/apache/airflow/pull/65349 (Patch, patch, Issue Tracking)
- lists.apache.org/thread/wz5l58drprmwlv6jxnq466x24jqbbhp7 (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-41018?
- CVE-2026-41018 is a medium-severity vulnerability in Apache Apache-Airflow-Providers-Elasticsearch, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.5/10. Published 2026-05-11.
- How severe is CVE-2026-41018?
- Medium severity. CVSS v3 base score is 6.5 out of 10.