{"id":"CVE-2026-58076","published":"2026-08-12T15:40:59Z","modified":"2026-09-16T14:55:55Z","title":"Apache Airflow: Unguarded import_string() of airflow_exc_ser / base_exc_ser exception nodes in…","vendor":"Apache","product":"Apache Airflow","tier":"tail","description":{"text":"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`.","provenance":"source","from":"CVE.org"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"CISA ADP Vulnrichment"},"epss":{"score":0.00484,"percentile":0.41582,"provenance":"source"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"references":[{"url":"https://github.com/apache/airflow/pull/68511","tags":["patch"]},{"url":"https://lists.apache.org/thread/t81p688t15jozxsng8521o60nh2kfsos","tags":["vendor-advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33264","tags":["related"]}],"priority":{"score":14.5,"factors":[{"name":"EPSS percentile","points":8.32},{"name":"CVSS severity","points":6.16}]},"vendorSlug":"apache","affectedVersions":[{"vendor":"Apache Software Foundation","product":"Apache Airflow","versions":[">= 3.0.0, < 3.3.1"]}],"affected":[{"ecosystem":"PyPI","package":"apache-airflow","vulnerableRanges":[">=3.3.0, <3.3.1"],"patched":["3.3.1"],"from":["GHSA-8prw-8m6x-8w6f","PYSEC-2026-3991"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-57315","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-apache-airflow-cve-2026-33264","parents":[{"from":"CVE-2026-33264","to":"CVE-2026-58076","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-8prw-8m6x-8w6f","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-33264"},{"kind":"osv-related","provenance":"source","id":"PYSEC-2026-3991","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-33264"}]}],"children":[{"from":"CVE-2026-58076","to":"CVE-2026-67260","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-q4c3-7575-55j2","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-58076"},{"kind":"osv-related","provenance":"source","id":"PYSEC-2026-3707","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-58076"}]},{"from":"CVE-2026-58076","to":"CVE-2026-67587","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-2qjv-p2gc-mjg2","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-58076"},{"kind":"osv-related","provenance":"source","id":"PYSEC-2026-3708","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-58076"}]}]}}