Vulnerability-Lookup

PYSEC-2026-186

Vulnerability from pysec - Published: 2026-06-01 09:16 - Updated: 2026-06-03 10:54

Details

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.

Severity

7.3 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Impacted products

Name	purl
apache-airflow	pkg:pypi/apache-airflow

Aliases

CVE-2026-45360

JSON

To clipboard

{
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      "package": {
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        "name": "apache-airflow",
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    }
  ],
  "aliases": [
    "CVE-2026-45360"
  ],
  "details": "Apache Airflow\u0027s 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 \u2014 the default on single-host deployments where the DAG bundle is importable from the scheduler process \u2014 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.",
  "id": "PYSEC-2026-186",
  "modified": "2026-06-03T10:54:36.471897Z",
  "published": "2026-06-01T09:16:19.480Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/31/12"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/q227dghjwgfz8xsxrf2pwpz4wk43zm83"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/66737"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-45360 (GCVE-0-2026-45360)

Vulnerability from cvelistv5 – Published: 2026-06-01 07:48 – Updated: 2026-06-02 15:48

Title

Apache Airflow: Arbitrary import in custom deadline-reference deserialization

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.

Severity

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

apache

References

3 references

URL	Tags
https://github.com/apache/airflow/pull/66737	patch
https://lists.apache.org/thread/q227dghjwgfz8xsxr…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Airflow	Affected: 0 , < 3.2.2 (semver)

Credits

Jarek Potiuk

Show details on NVD website

JSON

To clipboard

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          }
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        "title": "CVE Program Container"
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                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-06-02T15:48:16.710203Z",
                "version": "2.0.3"
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      "source": {
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      "title": "Apache Airflow: Arbitrary import in custom deadline-reference deserialization",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

PYSEC-2026-186

CVE-2026-45360 (GCVE-0-2026-45360)

Tags

Sightings

Nomenclature