CVE-2026-45360 json
Apache Airflow: Arbitrary import in custom deadline-reference deserialization
published 2026-06-01 5 mo ago modified 2026-11-03 6 d ago also BIT-airflow-2026-45360 , EUVD-2026-33587 , GHSA-2r5m-76wx-56gx , PYSEC-2026-186
- cvss
- 7.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 52%
- public exploits
- 0
- none known
Summary
Apache Airflow's scheduler-side deadline-reference decoder (`SerializedCustomReference.deserialize_reference`) imported and dispatched arbitrary class paths drawn from DAG-author-controlled serialized state without an allowlist or plugin-registry gate. A DAG author whose code reaches the scheduler — the default on single-host deployments where the DAG bundle is importable from the scheduler process — could embed a custom `DeadlineReference` whose serialized form named an attacker-controlled module path, causing the scheduler to `import_string(...)` and instantiate that class with a live SQLAlchemy session attached. Affects deployments where DAG-author code is less trusted than the scheduler process. Users are advised to upgrade to `apache-airflow` 3.2.2 or later.
Patch / fix
- pypi apache-airflow 3.2.2
- bitnami airflow 3.2.2
- Apache Software Foundation Apache Airflow 3.0.0, 3.2.2
- github.com/apache/airflow#66737 pull request
- github.com/apache/airflow#61461 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| GitHub | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| CNA | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| OSV | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | apache-airflow | >=3.2.0, <3.2.2 <3.2.2 |
3.2.2 |
| bitnami | airflow | <3.2.2 |
3.2.2 |
Affected products
- Apache Software Foundation Apache Airflow
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
github.com
/apache/airflow/pull/66737
patch, web, issue-tracking
-
github.com
/apache/airflow/pull/61461
web
-
lists.apache.org
/thread/q227dghjwgfz8xsxrf2pwpz4wk43zm83
vendor-advisory, web, mailing-list, advisory
-
openwall.com
/lists/oss-security/2026/05/31/12
web, mailing-list, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-45360
advisory, web
-
github.com
/apache/airflow
package
-
github.com
/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-186.yaml
web
-
github.com
/advisories/GHSA-2r5m-76wx-56gx
advisory
Sources
- CVE List CVE-2026-45360
- GitHub Advisory GHSA-2r5m-76wx-56gx
- NVD CVE-2026-45360
- OSV BIT-airflow-2026-45360
- OSV PYSEC-2026-186
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.