CVE-2026-59244 json
Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Templates UI
published 2026-08-12 2 mo ago modified 2026-11-03 5 d ago also BIT-airflow-2026-59244 , EUVD-2026-57316 , GHSA-f643-3rc2-j27w , PYSEC-2026-3706
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 13%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi apache-airflow 3.3.1
- bitnami airflow 3.3.1
- Apache Software Foundation Apache Airflow 3.0.0, 3.3.1
- github.com/apache/airflow@917a086 commit
- github.com/apache/airflow@aee1826 commit
- github.com/apache/airflow@b23955a commit
- github.com/apache/airflow#68975 pull request
- github.com/apache/airflow/releases/tag/3.3.1 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | apache-airflow | <3.3.1 |
3.3.1 |
| bitnami | airflow | <3.3.1 |
3.3.1 |
Affected products
- Apache Software Foundation Apache Airflow
Classification
- Weakness
-
- CWE-312 Cleartext Storage of Sensitive Information
References
-
github.com
/apache/airflow/pull/68975
patch, web, issue-tracking
-
github.com
/apache/airflow/commit/917a086be848943aaaaa577b927e381f2dc1e99f
web
-
github.com
/apache/airflow/commit/aee182636d0b10a95d94400f7d8b3228dc2c802f
web
-
github.com
/apache/airflow/commit/b23955afc5c74386a092a1be5bcd376751c3c8a9
web
-
lists.apache.org
/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6
vendor-advisory, web, mailing-list, advisory
-
openwall.com
/lists/oss-security/2026/08/12/7
web, mailing-list, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-59244
advisory, web
-
github.com
/apache/airflow
package
-
github.com
/apache/airflow/releases/tag/3.3.1
web
-
github.com
/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-3706.yaml
web
-
github.com
/advisories/GHSA-f643-3rc2-j27w
advisory
Sources
- CVE List CVE-2026-59244
- GitHub Advisory GHSA-f643-3rc2-j27w
- NVD CVE-2026-59244
- OSV BIT-airflow-2026-59244
- OSV PYSEC-2026-3706
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.