{"affected":[{"defaultStatus":"unaffected","ecosystem":"pypi","packageName":"apache-airflow-core","product":"Apache Airflow","source":"CNA: apache","vendor":"Apache Software Foundation","versions":[{"lessThan":"3.3.1","status":"affected","version":"3.0.0","versionType":"semver"}]}],"cveId":"CVE-2026-58076","cwes":["CWE-502"],"description":"Apache Airflow's serialization layer reconstructed exception nodes by calling `import_string()` on a class name taken from the serialized blob and instantiating it with arguments from the same blob, with no restriction on what could be imported. An operator's `executor_config` reaches that branch, so a Dag author could place a value there that causes an arbitrary callable to be imported and invoked -- for example `subprocess.check_output`, or `builtins.eval` on the `builtins`-prefixed variant. The code runs in the **Scheduler**, which reconstructs serialized Dags in its normal loop with no request involved, and in the **API server**, on any authenticated read of the Dag such as `GET /api/v2/dags/{dag_id}/details`. Both are components the Airflow security model states must never execute Dag-author code, and both hold the metadata database credentials and the JWT signing secret. No non-default configuration is required. This is a **different sink from CVE-2026-33264**, which covered only the trigger branch of the same deserializer: deployments that upgraded in response to that advisory are still affected through the exception branch and must upgrade again. Users are advised to upgrade to apache-airflow 3.3.1 or later, which restricts the imported class to a subclass of `BaseException`.","epss":{"date":"2026-11-02","percentile":0.41706,"score":0.00484},"exploits":[],"kev":null,"metrics":[{"score":8.8,"severity":"high","source":"ADP: CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793689124859,"publishedAt":1786549259934,"references":[{"source":"CNA: apache","tags":["patch"],"url":"https://github.com/apache/airflow/pull/68511"},{"source":"CNA: apache","tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/t81p688t15jozxsng8521o60nh2kfsos"},{"source":"CNA: apache","tags":["related"],"url":"https://www.cve.org/CVERecord?id=CVE-2026-33264"}],"remediation":[{"kind":"fix","source":"CNA: apache","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/apache/airflow/pull/68511"}],"revision":"c75b3a62d1e65e8ef855cf740c484f9fb1fc98216d33f7d7dc32dcb8510eaf6c","sources":[{"modifiedAt":1793689124859,"name":"CNA: apache","retrievedAt":1793689771087,"url":"https://www.cve.org/CVERecord?id=CVE-2026-58076"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793689785373,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-58076"}],"ssvc":{"assessedAt":1787060601351,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Apache Airflow: Unguarded import_string() of airflow_exc_ser / base_exc_ser exception nodes in BaseSerialization.deserialize enables DAG-author RCE on Scheduler / API Server","updatedAt":1793689785373}