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Apache Airflow Providers ElasticsearchWeb server / proxy · Apache

CVE-2026-41018

MEDIUM · 6.5 CVSS v3.1 Published 2026-05-11
Fix available
A fix is available. Upgrade to 6.5.3 or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
The Elasticsearch 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-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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-532

Sensitive values — secrets, tokens, session identifiers, personal data — are written into log files, so anyone with access to the logs, which is often a broad group, obtains them. It turns a routine diagnostic into a credential leak. The fix is redacting sensitive data before it is logged and tightly restricting who can read the logs.

General guidance for the sensitive information in logs class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Apache Airflow Providers ElasticsearchWeb server / proxy
Affected:< 6.5.3

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.5.3 or later
Fixed in 6.5.3
Vendor patch github.com →
Recommended fix High confidence

apache-airflow-providers-elasticsearch 6.5.3

  1. 1. Identify the current version of apache-airflow-providers-elasticsearch installed in your environment using 'pip show apache-airflow-providers-elasticsearch' or your package manager.
  2. 2. Upgrade the package to version 6.5.3 or later using pip: 'pip install --upgrade apache-airflow-providers-elasticsearch>=6.5.3'
  3. 3. Verify the new version is installed correctly: 'pip show apache-airflow-providers-elasticsearch'
  4. 4. Restart any Airflow web servers, schedulers, and workers to ensure the updated provider is loaded.
  5. 5. As a defense-in-depth measure, review your Elasticsearch host configuration in the Airflow config and migrate embedded credentials to a secret backend (such as Airflow's secrets backend, environment variables, or a secrets manager) instead of including them in the URL.
Caveat Review provider release notes for any breaking changes between your current version and 6.5.3; major version upgrades may include breaking changes to logging behavior or dependencies.

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-41018 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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