{"schema":"threatline.record/2","record":{"id":"CVE-2026-67587","aliases":["BIT-airflow-2026-67587","GHSA-2qjv-p2gc-mjg2","PYSEC-2026-3708"],"summary":"Apache Airflow Task SDK Callback deserialization can import arbitrary modules in the scheduler","details":"Apache Airflow's Task SDK rebuilt a `Callback` object from serialized data by re-running its constructor, which imports the module named by the stored callback path. Because `SyncCallback` is itself an Airflow class it passes the default `allowed_deserialization_classes` allow-list, so tightening that setting does not help. A Dag author — who controls a task instance's `next_kwargs` through the task execution API — can therefore cause an arbitrary module to be imported inside the scheduler process, when the scheduler's `awaiting_input` timeout sweep deserializes that value. No non-default configuration is required; the sweep runs unconditionally. Versions before 3.3.0 are not affected: the class existed, but the scheduler sweep that reaches it did not. This is a separate code path from CVE-2026-58076 and CVE-2026-67260, which cover different gadgets reaching deserialization — applying either of those fixes does not address this one. Users are advised to upgrade to apache-airflow 3.3.1 or later.","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-2qjv-p2gc-mjg2","source_modified_at":"2026-10-02T23:15:28Z","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-2026-67587","source_modified_at":"2026-09-16T14:56:11.653Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Apache Airflow","vendor":"Apache Software Foundation","versions":[{"lessThan":"3.3.1","status":"affected","version":"3.3.0","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-2qjv-p2gc-mjg2","source_modified_at":"2026-10-02T23:40:52.688196939Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"apache-airflow","ecosystem":"PyPI","purl":"pkg:pypi/apache-airflow"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.3.0"},{"fixed":"3.3.1"}]}],"versions":["3.3.0","3.3.1rc1","3.3.1rc2"]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-2qjv-p2gc-mjg2","source_modified_at":"2026-10-02T23:15:28Z","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-2026-67587","source_modified_at":"2026-09-16T14:56:11.653Z","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-2qjv-p2gc-mjg2","source_modified_at":"2026-10-02T23:40:52.688196939Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"apache-airflow","ecosystem":"PyPI","purl":"pkg:pypi/apache-airflow"},"version":"3.3.1"}],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00611,"percentile":0.48652,"score_date":"2026-10-23"},"published_at":"2026-08-12T15:32:10.565Z","modified_at":"2026-10-02T23:40:52.688196939Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-2qjv-p2gc-mjg2","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-02T23:15:28Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-67587","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-09-16T14:56:11.653Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-2qjv-p2gc-mjg2","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-02T23:40:52.688196939Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-67587","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-2026-67587","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/apache/airflow/pull/70704","tags":["patch"]},{"source":"CVE List","url":"https://lists.apache.org/thread/o00ww4n69qojvsckb464dtwd2nhzy6t0","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-58076","tags":["related"]},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-67260","tags":["related"]},{"url":"https://github.com/apache/airflow/commit/1baee0bf987eb220f15398e43572e1ed819a0130","source":"GitHub Advisory Database"},{"url":"https://github.com/apache/airflow/commit/2b598cb8b0570c941633be3d16a7eb912f73180c","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-2026-3708.yaml","source":"GitHub Advisory Database"},{"url":"https://github.com/advisories/GHSA-2qjv-p2gc-mjg2","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":"2026-08-13T12:17:23.923988Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-02T23:40:52.688196939Z","content_hash":"0b1968ac7d34a88bc1a4a54bd6ab8037b4af560709fd38b7e31ae0afdc05eb58"}}