Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Templates UI (CVE-2026-59244) | HOL Guard CVE

Medium · CVSS 6.5CVE-2026-59244

Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Templates UI

Answer in brief

CVE-2026-59244 records a Medium severity (CVSS 6.5) vulnerability in Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Templates UI. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/Apache Airflow (generic), apache-airflow (pypi). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 12, 2026Updated Sep 16, 2026Source checked Sep 27, 2026First seen by HOL Aug 12, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.5
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/Apache Airflow (generic), apache-airflow (pypi). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:apache:airflow::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Apache Software Foundation/Apache Airflowgeneric	>=0 <3.3.1	3.3.1
apache-airflowpypi	>=0 <3.3.1	3.3.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/Apache Airflow, apache-airflow.
Review the reported fix. Update Apache Software Foundation/Apache Airflow to 3.3.1; apache-airflow to 3.3.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 12, 2026

Sources and claim methodology

Upstream source description

Apache Airflow's secrets masker did not mask `var.json` Variable values whose value is a dict in the Rendered Templates UI — the dict value failed an `isinstance(str)` guard — so a secret stored as a JSON Variable and referenced in a template via `var.json` was displayed in cleartext to any user with access to that task's Rendered Templates view. Users are advised to upgrade to apache-airflow 3.3.1 or later, which masks nested Variable values regardless of type.

Quoted source text, attributed separately from HOL analysis.