Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Templates UI
Published Aug 12, 2026
6.5
MEDIUMCVSS 3.1
EPSS 0.39%
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.
Affected products
-
- Version 0StatusaffectedConstraints<3.3.1
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Airflow | unaffected |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Aug 18, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.39% (0.00390) | 30.68th | v5 (v2026.06.15) |
| Aug 13, 2026 | 0.11% (0.00106) | 1.27th | v5 (v2026.06.15) |
References (10)
- http://www.openwall.com/lists/oss-security/2026/08/12/7 Mailing ListThird Party Advisory
- https://github.com/advisories/GHSA-f643-3rc2-j27w Advisory
- https://github.com/apache/airflow/commit/917a086be848943aaaaa577b927e381f2dc1e99f
- https://github.com/apache/airflow/commit/aee182636d0b10a95d94400f7d8b3228dc2c802f
- https://github.com/apache/airflow/commit/b23955afc5c74386a092a1be5bcd376751c3c8a9
- https://github.com/apache/airflow/pull/68975 patchIssue Tracking
- https://github.com/apache/airflow/releases/tag/3.3.1
- https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-3706.yaml
- https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6 vendor-advisoryMailing ListVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-59244
Change history (0)
No recorded changes yet.