{"schema":"threatline.record/2","record":{"id":"CVE-2026-58076","aliases":["BIT-airflow-2026-58076","GHSA-8prw-8m6x-8w6f","PYSEC-2026-3991"],"summary":"Apache Airflow exception-node deserialization permits arbitrary callable execution","details":"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`.","categories":["Libraries & packages"],"product":"apache-airflow","vendor":"Apache Software Foundation","ecosystem":"pip","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-8prw-8m6x-8w6f","source_modified_at":"2026-10-02T23:12:36Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"pip","name":"apache-airflow"},"range":">= 3.3.0, < 3.3.1"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-58076","source_modified_at":"2026-09-16T14:55:55.813Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Apache Airflow","vendor":"Apache Software Foundation","versions":[{"lessThan":"3.3.1","status":"affected","version":"3.0.0","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-8prw-8m6x-8w6f","source_modified_at":"2026-10-02T23:40:41.994276070Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"PyPI","name":"apache-airflow","purl":"pkg:pypi/apache-airflow"},"ranges":[{"events":[{"introduced":"3.3.0"},{"fixed":"3.3.1"}],"type":"ECOSYSTEM"}],"versions":["3.3.0","3.3.1rc1","3.3.1rc2"]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-8prw-8m6x-8w6f","source_modified_at":"2026-10-02T23:12:36Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"pip","name":"apache-airflow"},"version":"3.3.1"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-58076","source_modified_at":"2026-09-16T14:55:55.813Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Apache Airflow","ecosystem":null},"version":"3.3.1","basis":"first unaffected version stated in the CVE record"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-8prw-8m6x-8w6f","source_modified_at":"2026-10-02T23:40:41.994276070Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"PyPI","name":"apache-airflow","purl":"pkg:pypi/apache-airflow"},"version":"3.3.1"}],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00484,"percentile":0.40786,"score_date":"2026-10-23"},"published_at":"2026-08-12T15:40:59.934Z","modified_at":"2026-10-02T23:40:41.994276070Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-8prw-8m6x-8w6f","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-02T23:12:36Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-58076","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-09-16T14:55:55.813Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-8prw-8m6x-8w6f","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-02T23:40:41.994276070Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-58076","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58076","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/apache/airflow/pull/68511","tags":["patch"]},{"source":"CVE List","url":"https://lists.apache.org/thread/t81p688t15jozxsng8521o60nh2kfsos","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-33264","tags":["related"]},{"url":"https://github.com/apache/airflow/commit/3a08a3d7792335ac9456cd44c92d8de3ae0d6ec1","source":"GitHub Advisory Database"},{"url":"https://github.com/apache/airflow/commit/560f117525d201ed64327c4185050705339e07b1","source":"GitHub Advisory Database"},{"url":"https://github.com/apache/airflow/releases/tag/3.3.1","source":"GitHub Advisory Database"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-3991.yaml","source":"GitHub Advisory Database"},{"url":"https://github.com/advisories/GHSA-8prw-8m6x-8w6f","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-08-18T13:43:21.351742Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-02T23:40:41.994276070Z","content_hash":"ebe2d1817e3ec0a145e52012eff5d4cf260153edf898a0beedafc6a022d896c9"}}