CVE-2026-59244
Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Templates UI
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.
INFO
Published Date :
Aug. 12, 2026, 4:17 p.m.
Last Modified :
Sept. 16, 2026, 3:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Upgrade Apache Airflow to version 3.3.1 or later.
- Verify secret masking in the UI.
- Review variable storage and access controls.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-59244.
| URL | Resource |
|---|---|
| https://github.com/apache/airflow/pull/68975 | Issue Tracking Patch |
| https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6 | Mailing List Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/08/12/7 | Mailing List Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-59244 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-59244
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-59244 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-59244 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Sep. 16, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/59xxx/CVE-2026-59244.json">CVE-2026-59244</a> Added Reference https://github.com/apache/airflow/pull/68975 Added Reference https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6 Removed Reference https://github.com/apache/airflow/pull/68975 Removed Reference https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6 Removed Reference Type https://github.com/apache/airflow/pull/68975 Types: Issue Tracking, Patch Removed Reference Type https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6 Types: Mailing List, Vendor Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Sep. 16, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/08/12/7 Removed Reference http://www.openwall.com/lists/oss-security/2026/08/12/7 Removed Reference Type http://www.openwall.com/lists/oss-security/2026/08/12/7 Types: Mailing List, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 18, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added SSVC {'id': 'CVE-2026-59244', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-18T13:43:56.777503Z'} -
Initial Analysis by [email protected]
Aug. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:* versions up to (excluding) 3.3.1 Added Reference Type Apache Software Foundation: https://github.com/apache/airflow/pull/68975 Types: Issue Tracking, Patch Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6 Types: Mailing List, Vendor Advisory Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/08/12/7 Types: Mailing List, Third Party Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Aug. 12, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/08/12/7 -
New CVE Received by [email protected]
Aug. 12, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Apache Software Foundation', 'product': 'Apache Airflow', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '3.3.1', 'versionType': 'semver'}], 'packageName': 'apache-airflow', 'collectionURL': 'https://pypi.python.org', 'defaultStatus': 'unaffected'}] Added 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. Added CWE CWE-312 Added Reference https://github.com/apache/airflow/pull/68975 Added Reference https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6