CVE-2026-42360
Apache Airflow: Rendered template truncation bypasses nested sensitive-key masking
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested password / token / secret / api_key keys inside a JSON template structure) to be bypassed when the rendered field exceeded [core] max_templated_field_length: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into rendered_fields. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of CWE-200 previously addressed for the user-registered mask_secret() patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to apache-airflow 3.2.2 or later to cover the nested-key path.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
6.5
Apache Airflow: Rendered template truncation bypasses nested sensitive-key masking
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested password / token / secret / api_key keys inside a JSON template structure) to be bypassed when the rendered field exceeded [core] max_templated_field_length: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into rendered_fields. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of CWE-200 previously addressed for the user-registered mask_secret() patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to apache-airflow 3.2.2 or later to cover the nested-key path.
- Record
CVE-2026-42360- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-03
EUVDEUVD-2026-33590
6.5
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested password / token / secret / api_key keys inside a JSON template structure) to be bypassed when the rendered field exceeded [core] max_templated_field_length: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into rendered_fields. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of CWE-200 previously addressed for the user-registered mask_secret() patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to apache-airflow 3.2.2 or later to cover the nested-key path.
- Record
EUVD-2026-33590- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cg3x-89rc-x9mw
6.5
Apache Airflow vulnerable to Exposure of Sensitive Information to an Unauthorized Actor
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested password / token / secret / api_key keys inside a JSON template structure) to be bypassed when the rendered field exceeded [core] max_templated_field_length: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into rendered_fields. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of CWE-200 previously addressed for the user-registered mask_secret() patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to apache-airflow 3.2.2 or later to cover the nested-key path.
- Record
GHSA-cg3x-89rc-x9mw- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
NVD
6.5
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested password / token / secret / api_key keys inside a JSON template structure) to be bypassed when the rendered field exceeded [core] max_templated_field_length: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into rendered_fields. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of CWE-200 previously addressed for the user-registered mask_secret() patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to apache-airflow 3.2.2 or later to cover the nested-key path.
- Record
CVE-2026-42360- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-03
OSV
6.5
Apache Airflow: Rendered template truncation bypasses nested sensitive-key masking
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested password / token / secret / api_key keys inside a JSON template structure) to be bypassed when the rendered field exceeded [core] max_templated_field_length: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into rendered_fields. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of CWE-200 previously addressed for the user-registered mask_secret() patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to apache-airflow 3.2.2 or later to cover the nested-key path.
- Record
CVE-2026-42360- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-04
OSVGHSA-cg3x-89rc-x9mw
6.5
Apache Airflow vulnerable to Exposure of Sensitive Information to an Unauthorized Actor
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested password / token / secret / api_key keys inside a JSON template structure) to be bypassed when the rendered field exceeded [core] max_templated_field_length: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into rendered_fields. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of CWE-200 previously addressed for the user-registered mask_secret() patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to apache-airflow 3.2.2 or later to cover the nested-key path.
- Record
GHSA-cg3x-89rc-x9mw- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
OSVPYSEC-2026-172
6.5
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested password / token / secret / api_key keys inside a JSON template structure) to be bypassed when the rendered field exceeded [core] max_templated_field_length: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into rendered_fields. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of CWE-200 previously addressed for the user-registered mask_secret() patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to apache-airflow 3.2.2 or later to cover the nested-key path.
- Record
PYSEC-2026-172- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVBIT-airflow-2026-42360 No score
Apache Airflow: Rendered template truncation bypasses nested sensitive-key masking
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested password / token / secret / api_key keys inside a JSON template structure) to be bypassed when the rendered field exceeded [core] max_templated_field_length: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into rendered_fields. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of CWE-200 previously addressed for the user-registered mask_secret() patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to apache-airflow 3.2.2 or later to cover the nested-key path.
- Record
BIT-airflow-2026-42360- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
apache-airflowPyPI |
before 3.2.2 | 3.2.2 |
airflowBitnami |
before 3.2.2 | 3.2.2 |
apache-airflowPyPI |
before 3.2.2, plus listed versions 1.10.01.10.11.10.101.10.10rc11.10.10rc2 Show 45 moreShow less1.10.10rc31.10.10rc41.10.10rc51.10.111.10.11rc11.10.11rc21.10.121.10.12rc11.10.12rc21.10.12rc31.10.12rc41.10.131.10.13rc11.10.141.10.14rc11.10.14rc21.10.14rc31.10.14rc41.10.151.10.15rc11.10.1b11.10.1rc21.10.21.10.2b21.10.2rc11.10.2rc21.10.2rc31.10.31.10.3b11.10.3b21.10.3rc11.10.3rc21.10.41.10.4b21.10.4rc11.10.4rc21.10.4rc31.10.4rc41.10.4rc51.10.51.10.5rc11.10.61.10.6rc11.10.6rc21.10.7 |
3.2.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | CVE List, EUVD, NVD, OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-42360 is a medium vulnerability (CVSS 6.5) in Apache Airflow, published June 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 28th percentile. Fixed in apache-airflow 3.2.2.
References
github.com/apache/airflow/pull/65906
lists.apache.org/thread/obj79bpxnl7r5olz1gsn0g94y88glnl4
nvd.nist.gov/vuln/detail/CVE-2026-42360
github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-172.yaml
github.com/advisories/GHSA-cg3x-89rc-x9mw
pypi.python.org
github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42360.json
github.com/apache/airflow
Left out here: 239 versions. The JSON record has them.