BIT-airflow-2026-33264

    Dashboard / Vulnerabilities / BIT-airflow-2026-33264

    BIT-airflow-2026-33264

    Published: 9 Jul 2026Last Modified: 8 Sept 2026

    Summary: Apache Airflow: DAG author RCE on webserver via unrestricted import_string() in BaseSerialization.deserialize()

    Details: A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist.

    References: http://www.openwall.com/lists/oss-security/2026/07/07/1, https://github.com/apache/airflow/pull/66002, https://github.com/apache/airflow/pull/68528, https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj, https://nvd.nist.gov/vuln/detail/CVE-2026-33264

    Affected packages

    Package

    Name: airflow

    Purl: pkg:bitnami/airflow

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -3.3.0

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High